How do you get on with shooting wide with filters. I've offered up a 4x4 filter holder to the front of the hood and it vignette's at 14-18mm. Once the built in hood was chopped off there wasn't a problem.

Could somebody point me towards heliopan +0.25 .. I can only find +1 +2 and +3

@kavadni I have one, but they are very rare. Best you can do is create an eBay search alert.

@fabro106 I think you're really going to struggle. If I remember rightly, Canon make a large diopter (105mm) but it's mega-bucks, like £400+. Regular round diopters go up to about 77mm, which you could use with a step down ring.

@xenocide38 How are you getting on with your LA7200? Diopters don't help if your filming at infinity though, and you'll still suffer softness, especially in the corners. I've used the Cokin P101, the Heliopan 0.25 and the Tokina 0.4 and it's still only performs will in certain situations.

@itimjim the LA7200 works well for me in a film setting where I have full control over the variables and have time to adjust. The diopters do their job and they have limitations but it's almost always better than the stock LA7200. For infinity focus I just take off any diopters. I've gotten some good results from the LA7200 and while it's certainly not perfect, most of the time I'm able to "correct" the problem I am having by some other means. I wrote up a Part 2 about the LA7200 on my blog if you want to check out more specifics.

http://stronzvanderploeg.net/2012/08/10/anamorphic-shooting-with-the-la7200-part-2/

Peoples are looking for rare 0.5 and 0.25 dioptres?

Don't forget that dioptres add, so for example

+3.0D + (-2.5D) = 0.5D, and 3D and -2.5 D not so rare :)

best ones are achromats and some are cheap in surplus stores like SurplusShed

Reading around and not being able to test, what is the best way to improve ag la7200, in front of or behind

@radikalfilm The +1 might be too much, how do objects look at 1m?

@radikafilm, yes precisely. If you want to try and work out theoretical distances, with a 2x adapter you have to work with two DOF tables. If your working with a 25mm lens, you consult a 25mm DOF table to work out what will have an acceptable vertical 'circle of confusion' and a 50mm for the horizontal. The useable DOF is where the two overlap.

The Panny 14-42 is actually quite a nice match with the LA7200 as its max aperture is f4.

I've stuck mine on the front of a Tokina 28-80, and if works (looks awesome too), but again keep it f4 or less.

@HoneyColour I have the Nikon 80-200mm and it works great with the GH2 for video. Granted it's VERY telephoto but it works.

As far as the 80-200mm with the LA7200, it'll work but the 80-200mm already has a limited close focus, and then the LA7200 makes that even worse.

On my blog I posted some breakdowns of using the LA7200 and in Part 2 I tested the Nikon 80-200mm with the LA7200