Tagged with focus - Personal View Talks http://personal-view.com/talks/discussions/tagged/focus/p1/feed.rss Tue, 19 Nov 24 11:25:47 +0000 Tagged with focus - Personal View Talks en-CA Focos for Video http://personal-view.com/talks/discussion/23499/focos-for-video Thu, 06 Feb 2020 06:57:48 +0000 tida 23499@/talks/discussions Focos is an App for iPhone which emulates 3D lens focus for images. In the following article they state that Software company does develope currently a version for video. This Should be very interesting if it works that well as it already does for images.

https://www.theverge.com/2019/9/9/20856585/focos-2-0-hands-on-portrait-mode-blur-any-photo

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Veydra Cine lenses specifically designed for micro 4/3 mount!! http://personal-view.com/talks/discussion/11787/veydra-cine-lenses-specifically-designed-for-micro-43-mount Tue, 18 Nov 2014 03:34:52 +0000 fotosiamo 11787@/talks/discussions There's a Kickstarter for cinema lenses built specifically for the micro 4/3 mount. Some very respectable names on the video talking about the lenses, especially Matthew Duclos, who helped with the optics design!

https://www.kickstarter.com/projects/665053329/veydra-m4-3-cinema-lenses-for-gh4-and-bmpcc

What is Veydra?

Veydra is a premium cinema lens made specifically for filmmakers using Micro 4/3 cameras.

Veydra Mini Prime lenses all feature

  • Resolution that exceeds 4K
  • Cinema 0.8 module focus and iris gears
  • Consistent front 80mm outside diameter & 77mm filter threading
  • Similar length for quick lens changes
  • Constant T2.2 aperture for easy lighting set ups
  • Brass plated mounts for durability.
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GH5 Focus via USB-C http://personal-view.com/talks/discussion/20047/gh5-focus-via-usb-c Thu, 12 Jul 2018 02:25:30 +0000 robinvalk 20047@/talks/discussions Hi,

i just wondered if it is possible to focus on the GH5 via USB-C? Either with a bought device or by building the controller by yourself. Since the Ronin S can do it i am quiet sure it should also be possible for others?

Thank you!

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Electric FF under $1k? http://personal-view.com/talks/discussion/18642/electric-ff-under-1k Wed, 03 Jan 2018 22:52:11 +0000 upwithmike 18642@/talks/discussions I'm looking for an electric FF that I can use with a thumbwheel on my gimbal and shoulder rig, wireless is great but wired is also fine. Would be nice if I had the option to add a wireless remote with wheel and hard stops at a later time.

There seem to be several on the horizon, like the Tilta Nucleus-M and Nucleus-N, Zhiyun's mechanical FF, and the Filmpower Nebula FF all sound great but when are any of them actually going to be available? I'm also looking at some of the Ikan and Redrock FF systems, but they're a little outside of my budget. Any others I should be aware of?

Mike

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GH5 Focus Transition things to come http://personal-view.com/talks/discussion/16989/gh5-focus-transition-things-to-come Tue, 23 May 2017 05:34:09 +0000 alcomposer 16989@/talks/discussions With the addition of GH5 Focus transition, (a feature borrowed from the AG-DVX200) this has got me thinking:

  • Focus Transition really only works well for lenses that don't breath- or breath minimally.

  • Possibly Panasonic may realise that there is a market for Video Centric MFT lenses

  • Panasonic will have to come out with more Video Centric glass to really utilise this feature. Also ParFocal Zooms would be nice!

  • If Panasonic created a USB-C follow focus protocol (with accompanying hardware- or allowed other companies to make) it would make me much more interested in native Panasonic glass.

  • If Panasonic are 'not' interested in making more Video Centric MFT glass then why put this feature into the GH5 at all? I'm sure it was not simple to code this into the firmware of 'fly-by-wire' lenses.

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Electric follow focus solutions http://personal-view.com/talks/discussion/3363/electric-follow-focus-solutions Sat, 26 May 2012 12:38:28 +0000 Vitaliy_Kiselev 3363@/talks/discussions image

image

image

Price: $230 + shipping

http://www.aliexpress.com/product-fm/535368761-Electric-follow-focus-zoom-controller-for-5D2-wholesalers.html

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CAME TV wireless Follow focus http://personal-view.com/talks/discussion/14227/came-tv-wireless-follow-focus Wed, 16 Dec 2015 04:12:19 +0000 tired 14227@/talks/discussions This is a quick what's in the box video of the CAME TV Wireless Follow Focus. It's a great little unit, compact, quiet and does what it's supposed to - adjust focus remotely. I'm finding more uses than I originally thought and I can see it replacing my mechanical follow focus on most occasions.

I intend to make a series of these showing the unit in action and running a couple of tests regarding battery life, repeatability etc.

I have a short film coming up the the next couple of months where the final scene involves a slow track in on a woman on a bench, it's midnight, there's fireworks and she's crying - easy! The FF becomes a necessity here but after playing around with it, there are so many other situations where I can make use of it.

Interviews - the FF can be used to adjust focus during in an interview situation if you haven't got a camera operator to do the job.

Jib - If I plan a jib shot I set the foreground out of focus but with the FF I can adjust focus throughout the move.

I use a shoulder rig on occasion so I might try to set the transmitter up on one of the arms and see what happens.

If there's anything anyone want's to know or a test they're interested in seeing done - let me know.

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Synchronized Motion Control for Single Focus of Anamorphic Projection Lens http://personal-view.com/talks/discussion/16788/synchronized-motion-control-for-single-focus-of-anamorphic-projection-lens Sat, 22 Apr 2017 07:34:43 +0000 RapidoTechnology 16788@/talks/discussions Rapido Single Focus Solution is the only solution that achieves single focus of anamorphic projection lens by digitally synchronize the taking lens and the anamorphic projection lens through encoded follow focus unit, and motor controlled focus ring.

Check out the video here:

and here:

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Single Focus Solution for Anamorphic Projection Lens http://personal-view.com/talks/discussion/16785/single-focus-solution-for-anamorphic-projection-lens Fri, 21 Apr 2017 09:47:22 +0000 RapidoTechnology 16785@/talks/discussions Rapido Single Focus Solution is the only solution that achieves single focus of anamorphic projection lens without adding any additional optics in front of the anamorphic lens.

The system works by digitally synchronize the taking lens and the anamorphic projection lens through encoded follow focus unit, and motor controlled focus ring

and here:

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Improve DFD contrast based auto focus for video. http://personal-view.com/talks/discussion/16596/improve-dfd-contrast-based-auto-focus-for-video. Wed, 15 Mar 2017 09:21:43 +0000 cas1 16596@/talks/discussions Dear Panasonic,

I love to see a better video auto focus system. DFD has already removed the first wrong direction start of the focus pull, but I like to address the second wrong direction autofocus pull, the "focus confirmation" rack at the end of the auto focus pull.

I'm not an engineer but I like to understand what is happening what, how, where, when and why.

At this moment the Auto Focus system for video looks the same as for stills. And for stills it works fast and well, accept in continuous high when it has a hard time keeping up with fast action. For video (akin to a very high number of stills) the AF is way to slow, and the focus confirmation pull is very distracting and jarring.

If DFD is able to measure the blur amount, and therefore can measure how far the subject is, the I think a reprogramming of the focus system can help to get rid of that jarring focus confirmation refocus.

I can think of this focusing system:

Focus pull situation:

1) DFD measures the amount of blurr, 2) compares it to the current focus distance, 3) estimates subject distance, 4) smoothly starts racking focus, 5) measures amount of blur half way racking focus, 6) checks the blur shift amount of the first and second measurement, outputs second focus target distance, 7) at the last part of the focus rack the focus speed eases off to arrive at the second estimated focus distance.

Continuous AF situations:

1) DFD measures the amount of blurr, 2) compares it to the current focus distance, 3) estimates subject distance, 4) smoothly starts racking focus, 5) measures amount of blur half way racking focus, 6) checks the blur shift amount and compares it to the first measurement, calculates subject movement, 7) rack focus to second focus target distance, 8) checks the blur shift amount and compares it to the previous measurement, calculates subject movement, 9) repeat 7 and 8 until no blur.

10) If subject leaves the frame maintain the current focus distance for x time before starting with 1 on the new subject in the assigned focus area.

Maybe DFD blur measurements are hard & slow, so having measurements while the camera is auto racking focus is harder to do, but I prefer a slower focus much over racking past the focus and racking back in video.

As a compromise DFD could be used to make a 1 time focus distance estimate, the focus racks smoothly (s curve) to the estimated distance, and stops (without racking past the estimate focus distance AND racking back). This would be good enough for a G85, and the more processing heavy higher DFD sample rate for the high end GH5. I must admit this all hinges on DFD accuracy in measuring the blur and estimating the subject distance.

What do you people think? Love to learn how the current contrast and DFD actually works. Love to hear your suggestions of how to improve AF.

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Motorized zoom lenses http://personal-view.com/talks/discussion/16303/motorized-zoom-lenses Sun, 08 Jan 2017 12:55:34 +0000 Brian_Siano 16303@/talks/discussions Does anyone know of any lenses, or kits, that run the zoom through a controllable motor? There's a project where I'd really like to have a long, slow, and smooth zoom. And while I could use a follow-focus rig to run the zoom ring, it'd be a bit jerky. Are there kits that enable motor control of a focus- or zoo ring, with highly variable speeds, so I could make my zoom last as long as I want?

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GH2 Stills Problem http://personal-view.com/talks/discussion/15933/gh2-stills-problem Mon, 24 Oct 2016 13:00:10 +0000 jondshank 15933@/talks/discussions Recently I started taking stills with my gh2 in addition to using it for it's AMAZING video.

When I manually focus, whether through the LCD or LVF just before the image is in focus to my eye it looks soft and dreamy more so than out of focus, and beyond the subject it will start to actually look out of focus.

I took some when it actually looked IN FOCUS and I feel like it just doesn't look as sharp as my old Canon 60D (By quite a bit to be honest)

I'll post a picture so you can see. I shot this in manual, f/2.8 at 70mm on a tripod with around 160 shutter speed and 200ISO. I'll post a before and after grade.

Before: http://imgur.com/a/H3bPw

After: http://imgur.com/JjxF8ZD

Do you think this is an operator, lens, or camera problem?

Also please do critique my grade, I'm relatively new to all this.

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GH2 Stills look soft (Tokina 28-70m f/2.8 + Metabones) http://personal-view.com/talks/discussion/15928/gh2-stills-look-soft-tokina-28-70m-f2.8-metabones Mon, 24 Oct 2016 00:03:00 +0000 jondshank 15928@/talks/discussions Recently I started taking stills with my gh2 in addition to the amazing video performance.

When I focus, whether through the LCD or LVF just before the image is in focus to my eye it looks soft and dreamy more so than out of focus, and beyond the subject it will start to actually look out of focus.

I took some when it actually looked IN FOCUS and I feel like it just doesn't look as sharp as my old Canon 60D (By quite a bit to be honest)

I'll post a picture so you can see. I shot this in manual, f/2.8 at 70mm on a tripod with around 160 shutter speed. I'll post a before and after grade.

Before: http://imgur.com/a/H3bPw

After: http://imgur.com/JjxF8ZD

Do you think this is an operator, lens, or camera problem?

Also please do critique my grade, I'm relatively new to all this.

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Review of Rectilux 3FF-W http://personal-view.com/talks/discussion/14493/review-of-rectilux-3ff-w Wed, 27 Jan 2016 04:24:18 +0000 JohnBarlow 14493@/talks/discussions Newsshooter Editor Dan Chung reviews Rectilux 3FF-W

Full article here: http://www.newsshooter.com/2016/01/27/real-anamorphic-for-less-the-rectilux-3ff-w-single-focus-adapter-reviewed/

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FS: 7" Monitor FeelWorld FW768 http://personal-view.com/talks/discussion/14519/fs-7-monitor-feelworld-fw768 Mon, 01 Feb 2016 06:36:22 +0000 f1lm3r 14519@/talks/discussions Hi all --

Selling a monitor in great condition. Used it exclusively with my Blackmagic Pocket. Works fine. Reason for selling is I'm not shooting enough these days and don't see the point of it lying around. Great monitor on a budget. Comes with original box and cables. Accepts LP-e6 battery. Features Histogram, False Color, Focus peaking, Frame Guides and audio meters. Asking $85 shipped in the US. Paypal preferred to confirmed address.

Here are some pics: Album [url]http://imgur.com/a/J0gWt[/url]

[img]http://i.imgur.com/wlLvLZ0.jpg[/img]

[img]http://i.imgur.com/WczaLml.jpg[/img]

[img]http://i.imgur.com/vyLYoKQ.jpg[/img]

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'AF-ON' setting in new GH4 firmware 2.5? http://personal-view.com/talks/discussion/14895/af-on-setting-in-new-gh4-firmware-2.5 Wed, 30 Mar 2016 11:20:06 +0000 GravitateMediaGroup 14895@/talks/discussions If the GH4 already has auto focus in video mode, what does af-on in video mode add or improve? sorry if it's a silly or obvious question, there just isn't much detail about it yet from my searches.

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3D Printed Monitor Bracket http://personal-view.com/talks/discussion/14887/3d-printed-monitor-bracket Mon, 28 Mar 2016 09:05:46 +0000 andyharris 14887@/talks/discussions Over this weekend break I finally got a 3D printer up and running. It's a Fisher Delta Beta, and cost about £249 including the first 500g of PLA filament.

I'm hoping to make props for a film with it. But a first job, here's a bracket for a 19" rack mount monitor that I use for focus confirmation on:

image

It was designed in Cheetah3D for which you can treat each unit as 1mm, which helps to create very accurate sizing etc.

image

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Choosing gears for follow focus http://personal-view.com/talks/discussion/1568/choosing-gears-for-follow-focus Sun, 27 Nov 2011 20:30:20 +0000 johnnyblank 1568@/talks/discussions
http://www.ebay.com/itm/170648910462?ssPageName=STRK:MESINDXX:IT&_trksid=p3984.m1436.l2649 - they look like a good price.

Also I'd be interested in 360 gears, but haven't seen many on the market.]]>
Freely refocusable camera, Lytro http://personal-view.com/talks/discussion/1227/freely-refocusable-camera-lytro- Wed, 19 Oct 2011 21:33:37 +0000 Vitaliy_Kiselev 1227@/talks/discussions

image

Their picture gallery:

http://www.lytro.com/living-pictures#living-pictures/282?&_suid=486

$399 price - https://www.lytro.com/camera

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Introducing Rectilux FF single focus CinemaScope Adapters http://personal-view.com/talks/discussion/11129/introducing-rectilux-ff-single-focus-cinemascope-adapters Tue, 26 Aug 2014 14:52:47 +0000 JohnBarlow 11129@/talks/discussions This thread is dedicated to the discussion and testing of Rectilux FF single focus CinemaScope adapters

For product specification, pricing, availability and business matters please visit my web site below as a matter of courtesy to our host.

http://www.transferconvert.co.uk/cinemania/

The vintage look digitally remastered...

I have a vimeo channel set up for the tests here:

https://vimeo.com/channels/rectilux (passwords are on the web site)

I also have a flickr account set up to view stills, which is the best way to evaluate sharpness etc

http://www.flickr.com/photos/125986580@N05/sets/72157646313357302/

I will shortly have a blog up and running, but you are very welcome to discuss these breakthough products here.

http://transferconvert.co.uk/cinemania/3ffpic09.png

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Looking for a single focus anamorphic for sale http://personal-view.com/talks/discussion/14082/looking-for-a-single-focus-anamorphic-for-sale Wed, 18 Nov 2015 16:38:39 +0000 AnamatisRmG 14082@/talks/discussions I have a kowa and isco set up now. Using a BMPCC and FS100. My lenses are double focus right now though and I'm looking to move to faster set ups.

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FS: Panasonic GH2 Gini Cage http://personal-view.com/talks/discussion/13154/fs-panasonic-gh2-gini-cage Thu, 11 Jun 2015 05:07:51 +0000 tinyrobot 13154@/talks/discussions Gini GH2 cage in Mint condition

Very lightly used with zero cosmetic blemishes. Use the rail mount to attach a Follow Focus, attach a handle or rails for shoulder handheld work.

$120 + shipping

Located in South Korea

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GH2 no longer re-focusing during filming on shutter half press. WTF? http://personal-view.com/talks/discussion/13522/gh2-no-longer-re-focusing-during-filming-on-shutter-half-press.-wtf Mon, 10 Aug 2015 05:22:50 +0000 lorilin 13522@/talks/discussions Hi folks,

This is weird. I fired up my GH2 today after not using it for a few months. Freshly charged battery.

I don't remember having changed any settings, and I'm using my same C2 custom preset as always. For whatever reason, I cannot get the camera to let me refocus with the half-press shutter technique when I'm filming. It just doesn't work. If I hunt around with my finger I eventually end up pressing too hard and the camera stops filming.

It's set to AF-s, with Shutter AF ON, and Half-press release OFF. (Maybe these are wrong?) I tried on both the 20mm pancake and the 14-42 kit lens.

Anybody else run into this? Any idea what it might be?

UPDATE! OK, I just messed around some more and found something even weirder! If I slightly move the camera body while half-pressing, then the autofocus works on half press. But if I hold the camera still (like on my monopod) it just won't refocus. I don't recall ever having this problem before. Sometimes the AF would hunt a bit when I would half-press refocus during filming, but it was at least responsive even when I held the camera still.

Thanks in advance!

Lori

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Low price zoom with medium-long focus throw? http://personal-view.com/talks/discussion/13178/low-price-zoom-with-medium-long-focus-throw Mon, 15 Jun 2015 14:47:38 +0000 joethepro 13178@/talks/discussions Looking for a normal zoom like the Tamron 17-50, Tokina 28-70, or something along those lines that has a focus throw longer than ~45 degrees. Pisses me off that so many low priced zooms now have such ridiculously short focus throws. Are there any that I should look into?

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FS: Panasonic Lumix GH1 in box with a ton of vintage prime lenses http://personal-view.com/talks/discussion/12422/fs-panasonic-lumix-gh1-in-box-with-a-ton-of-vintage-prime-lenses Sat, 21 Feb 2015 20:32:07 +0000 LiftCM 12422@/talks/discussions I am sadly selling my trusty GH1 with its lovely 1080/24p 75Mbps hack included with accessories in BOX. Ask me for video samples. I last used it on a two cam corporate video shoot for a major Pharma company and for a broadcast commercial. Its been the B-Cam companion to my GH2 for the last 8 months but I am wanting a second GH2.

I am throwing in an assortment of vintage lenses along with their m4/3 lens adapters! The highly sought after Minolta MD Rokkor-X 24mm f2.8 AND the Minolta MD Rokkor - X 45mm F2 Konica Hexanon AR 28mm f3.5 Brand New in Box New Old Stock never used Kalimar 28mm f2.8! Konica Hexanon AR 50mm f1.4 Konica Hexanon 57mm f1.8 (needs work) Konica Zoom Hexanon 65-135mm f4 (needs cleaning).

I also have a spare Chinar 28mm f2.8 I'll throw in as well if you need more than one 28mm or need an extra 28mm prime for a second camera. This is a ton of glass all in very good shape. Im only asking for $350 for all of the above and not really interested in selling just one lens for 50 bucks. I really need to clean out my camera bag and raise some cash to get another GH2. Anyone have a GH2 and willing to trade for all the above...that would be nice too!

Cheers, C

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FS: SLR Magic 12mm Gear (for V1 and V2) http://personal-view.com/talks/discussion/12658/fs-slr-magic-12mm-gear-for-v1-and-v2 Mon, 23 Mar 2015 22:17:49 +0000 thougts2uk 12658@/talks/discussions Hi Guys,

I am selling my SLR Magic 'official' FF Gear.

Including delivery $25 USD.

As new only been used on 2 shoots.

Thanks,

please email me directly; stuart.howe@gmail.com

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GH4 Manual focus being over riden?? http://personal-view.com/talks/discussion/12446/gh4-manual-focus-being-over-riden Mon, 23 Feb 2015 13:30:09 +0000 AlanEHoward 12446@/talks/discussions Hi all.. the clip below shows several issues I've been facing with the GH4 but mostly focus... Having seen some online tutorials it seems manual focus isn't as simple as you've expect ... The following clip had the camera set up for manual focus but, as you'll see approx 40 secs in it starts to hunt for focus (but only then!)..... am I missing something in the menu? I can't explain this ... I've checked and the button at the back was set to MF, although in the menu AFS/AFF is set to AFS and continuous AF is set to on (surely MF on the back overrides all this??)...... as the video shows the subject hardly moved and I never touched the focus ring ... re audio on the video, I'm waiting for the musician to supply a clean audio track!

Also I'd love some input from others on colours and noise ... This was shot using a cinelike D mode with everything set to 0 and edited in Prem Pro 2014 , If memory serves I was on 800 ASA which is high but I expected better results for the noise ... The "black" bars are not the same black as the black surrounding them on my monitor... I output the clip using the factory preset for Vimeo which presumably is RGB as opposed to 709, so surely the black bars should match the black on my screen?? (the bars are a shade lighter)

Aside from the focus issue I'd be very grateful for comments / advice / guidance on noise especially in the blacks which are always a bit crappy ..

Thanks

Alan

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GH4 + cine mini-primes: good Matte Box and Follow Focus options? http://personal-view.com/talks/discussion/11997/gh4-cine-mini-primes-good-matte-box-and-follow-focus-options Sat, 20 Dec 2014 11:50:14 +0000 lseerveld 11997@/talks/discussions I'm looking forward to receiving the new Veydra set when they ship. Up til now I've been using the Panasonic 12-35 and 35-100 zooms (with a variable ND when needed) on an Indisystem shoulder rig (with TV Logic 5.6" monitor when needed). I would like to have the option to add a Matte Box and single sided Follow Focus. Does anyone have suggestions for quality, light weight MB and FF that would work well with these primes and possibly also the zooms?

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HOW SINGLE FOCUS ANAMORPHIC ATTACHMENTS WORK http://personal-view.com/talks/discussion/12144/how-single-focus-anamorphic-attachments-work Sat, 10 Jan 2015 10:47:48 +0000 JohnBarlow 12144@/talks/discussions Enjoy!

image image image image

pdf download http://www.transferconvert.co.uk/cinemania/HOW%20SINGLE%20FOCUS%20ANAMORPHIC%20ATTACHMENTS%20WORK.pdf

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Custom Follow Focus Pinion Gears http://personal-view.com/talks/discussion/11939/custom-follow-focus-pinion-gears Wed, 10 Dec 2014 10:21:47 +0000 JohnBarlow 11939@/talks/discussions https://www.shapeways.com/shops/cinemania

We are pleased to announce that we have teamed up with Shapeways who will produce custom accessories based on our designs for our complete range of Rectilux CinemaScope Follow Focus Adapters and Lenses. More about these exciting products can be found at the website

http://www.transferconvert.co.uk/cinemania/cinemascope.html

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