ROMSPROD Posted January 15, 2015 Share Posted January 15, 2015 Hey guys, I just bought an OPTEX anamo lens + Tamron Diopter (28-200 A9F 72mm) to put on my GH4 and it looks nice, except that I think another diopter could be better (as it's very hard to focus close, even at 2m)...I use it on my Pana 12-35 F2,8 (I know it's better on prime lenses) so could you tell me : 1) which diopters would be better for it ? 2) which kind of lens (prime I assume) will be a killer with it ?3) what % do I have to put in FCPX to fit : 77% tall ?4) Is it a mandatory to be at F4 minimum to be sharp ? I saw Andrew's review but I couldn't find what I need.Thx a lot for your help Quote Link to comment Share on other sites More sharing options...
Tito Ferradans Posted January 15, 2015 Share Posted January 15, 2015 Hey ROMSPROD,1) it depends2) I like 35mm on the 5D, I have no idea of how that should be on the GH4.3) 75.8% tall or 133% wide.4) it depends.here's a couple links to help youAbout this kind of lens:http://tferradans.com/blog/?p=7204About diopters:http://tferradans.com/blog/?p=7282About workflow and post productionhttp://tferradans.com/blog/?p=7370also, there's the Diopter Thread here in this forum that will probably solve your questions regarding these auxiliary lenses. ROMSPROD 1 Quote Link to comment Share on other sites More sharing options...
ROMSPROD Posted January 15, 2015 Author Share Posted January 15, 2015 Thx a lot Tito ! I'll have a look on it ! Quote Link to comment Share on other sites More sharing options...
Grimor Posted January 15, 2015 Share Posted January 15, 2015 Same situation here! (Optex + 12-35 + Gh4)I've tested on this lenses: 14-42 kit, 12-35, FD 50 1.4 , FD 24 2.8, oly. 45 1.8 I think that modern lenses work best with this kind of anamorphic adaptor.For me 12-35 as wide as possible (around 20mm for no vignette) and f8 or similar get good image. (best of all of my lenses by far)My optex unit came with rear element fliped (reverse hack for close focusing) and terrible image quality.After fitting and aligned correctly the image get very decent.My advice is to put optex on the taking lens as close as possible , and with de 58mm threat direct to the 12-35 seems to hit the rear element of the optex again the front of the 12-35, so i'm using a 58-58 step ring (cheap UV filter without glass ?).Need time for more test, but would be great if we could share our results @ROMSPRODsorry for my english, i'm from Spain. ROMSPROD 1 Quote Link to comment Share on other sites More sharing options...
Rudolf Posted January 15, 2015 Share Posted January 15, 2015 I had the Optex a couple of years ago and I recall it has to be stopped down to get sharp like all focus through adapters. Unfortunately it will still not become that sharp even at f5.6. But as GH4 is so sharp this is not so bad maybe? The Tamron diopter is quite good. Nearly as good as the 0.5 Tokina. Cosimo murgolo and ROMSPROD 2 Quote Link to comment Share on other sites More sharing options...
ROMSPROD Posted January 16, 2015 Author Share Posted January 16, 2015 Thx Grimor and Rudolf ! Very very useful informations that finally summarize all what I heard : I have to stop down to be sharp (at least F4) and to keep my 12-35 at (approx) 18mm ! The only thing that I wonder now is : how can I record in low light if I am at F4 or F5.6....it's gonna be hard Quote Link to comment Share on other sites More sharing options...
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