Iscorama Anamophic Lens Test

Hi everyone,

I got an Iscorama 2005 MC and wanted to mount it on my 7D. I thought the Isco 2005 would have a Nikon F Mount because someone said so. Obviously its not. Its a Praktica B Mount. Now I need to wait for the B mount to EOS adaptor I ordered from eBay.

The lens is a 50mm 1:2,4 that can focus as close as 2m/6ft. I just hand held it to my 7D and noticed that the coating does a damn good job in killing those appreciated flairs.

cheers
Alex
 
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You may just need a stronger light source! My 42 MC flares nicely if the light is bright enough. Add a diopter or even a cheap uncoated UV filter to get more flare. With any luck, light entering at an angle will bounce off the back of the filter.
 
noticed that the coating does a damn good job in killing those appreciated flairs.
cheers
Alex[/quote]


the all in one unit you have will not flare any where near as much as the iscorama,54, 42 and 36 or any of the screw on attachments.
you have a complete sealed lens system.
the coatings and optical allignments are to good.
the advantage you have and the reason you should keep, is you have a fixed anamorphoser position so non of the usual bad allignments in your shots..
 
My apologies! Today I had the exact same problem with an isco 50/ M42 mount. Strange, when I tried it last week I shot a few stills without issue. I must have not had it screwed in fully to the adapter, I was only using the 50mm. Today I tried with the 42 amamorph on and wound it properly in tight and the mirror hit as you described.
 
Will an EOS adapter definitely be horizontal?

antiochuswilson said:
noticed that the coating does a damn good job in killing those appreciated flairs.
cheers
Alex
Click to expand...


the all in one unit you have will not flare any where near as much as the iscorama,54, he coatings and optical allignments are to good.
the advantage you have and the reason you should keep, is you have a fixed anamorphoser position so non of the usual bad allignments in your shots..[/quote]
 
echobass said:
My apologies! Today I had the exact same problem with an isco 50/ M42 mount. Strange, when I tried it last week I shot a few stills without issue. I must have not had it screwed in fully to the adapter, I was only using the 50mm. Today I tried with the 42 amamorph on and wound it properly in tight and the mirror hit as you described.
Click to expand...

Yes, bad. Best solution would be using it with the Nikkor 50/1.8. Or shave the mirror like they did on the 16-9 website.

Sad because i think the original back end ads a bit more retro feeling. But hadn´t enough time to test it.


BTW: Did anyone attached successfully a Follow Focus on the Iscorama?
 
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Sorry in the delay in getting back to you. Unfortunately we don't make 4x4 trays for series 9 or P size filters.
I congratulate you on coming up with a excellent solution.
cheers,
Steve Rushworth
Genus
 
sabrinus said:
Yes, bad. Best solution would be using it with the Nikkor 50/1.8. Or shave the mirror like they did on the 16-9 website.

Sad because i think the original back end ads a bit more retro feeling. But hadn´t enough time to test it.


BTW: Did anyone attached successfully a Follow Focus on the Iscorama?
Click to expand...

I'm using the new cinevate focus gears on my isco 36. The original back end isn't as sharp as a nikon or pentax takumar prime.
 
sabrinus said:
Thank you squig!
I also want to try the cinevate lens gear rings. The one with screws.
Or alternatively this one:
http://www.sgpro.co.uk/products/CINEfocus/lens gear/lensgear.html

What is your experience follow focusing this lens?
My focus ring is very stiff. I will send in the lens for new lubrication.
Click to expand...

I have 2 36s one is very loose the other very tight. I've only tried the loose one with a follow focus which works fine. I'm not that satisfied with the cinevate gears though. The focus ring on the isco is plastic and you have to be careful the screws on the cinevate gears aren't too tight and they are difficult to align properly. I think the zacuto or redrock gears would be a better option but I haven't tried them myself yet.
 
very little room for rack focus with iscorama. Anybody here got fancy ideas to rack focus with follow focus?
 
Iscorama 2005 test

Iscorama 2005 test

hi,
I posted that over at cinema5D forum:

I did a comparison between the Iscorama 2005 and my Sigma 24-70 both at f8. With the Sigma I matched the horizontal image boundaries of the isco (at around 33mm). Than I took stills and movie clips with both lenses at the highest resolution. I cropped the Sigma still to match the Isco as close as possible. Next I took the resulting aspect ratio of the Sigma still to unstretch the Isco still:

Sigma still after crop: 5099x2334 (1:2,1846615)
Iscorama 2005 still after unstretch: 7550x3456

I resized the Sigma still to match the Isco still:

Isco

Sigma


I think nobody was expecting a resolution gain from using an anamorphic lens. Its all about the look but it neither comes easy nor cheap.

alex
 
Iscorama 2005 test

Iscorama 2005 test

here are the comparison clips from my Iscorama 2005 vs Sigma 24-70mm test. Its all about the question, if an anamorphic lens will give you more detail for a scope style blow up. Or will the picture suffer more from cropping and scaling then it will do from unsqueezing ... the answer is no. In terms of resolution you don't get extra detail from the Iscorama 2005 for a (in my case) 2810x1080 image. The good thing is, the Iscorama 2005 isn't worse than a good regular lens like the Sigma 24-70mm 2.8 is one.

I scaled the Isco image in After Effects until it matched the image of the Sigma. The result was a 1:2.6 aspect ratio (1920x738). I scaled both movies to 2810x1080.

Iscorama 2005 2810x1080
http://www.meisterei.com/ISCORAMA2005_2810x1080_25p_h264.mov

Sigma 24-70mm 2810x1080
http://www.meisterei.com/Sigma2470_2810x1080_25p_h264.mov

native clips (trimmed)
http://www.meisterei.com/Iscorama2005_7D_native.mov
http://www.meisterei.com/Sigma24-70_7D_native.mov

alex
 
squig said:
I have 2 36s one is very loose the other very tight. I've only tried the loose one with a follow focus which works fine. I'm not that satisfied with the cinevate gears though. The focus ring on the isco is plastic and you have to be careful the screws on the cinevate gears aren't too tight and they are difficult to align properly. I think the zacuto or redrock gears would be a better option but I haven't tried them myself yet.
Click to expand...

Thank you squig!

I have my Isco 36 at maintenance and the guy told me he can lubricate it that it screws very smooth. I will get the lens back next week and will try ff.

I will give this lens gear rings a try:
http://www.sgpro.co.uk/

any experience with them??

They also have the screw system. Perhaps little rubber pads between the screws and the lens barrel will help?
 
sabrinus said:
Thank you squig!

I have my Isco 36 at maintenance and the guy told me he can lubricate it that it screws very smooth. I will get the lens back next week and will try ff.

I will give this lens gear rings a try:
http://www.sgpro.co.uk/

any experience with them??

They also have the screw system. Perhaps little rubber pads between the screws and the lens barrel will help?
Click to expand...

I haven't tried those gears but they are a similar design to the cinevate so I don't think they will be very good on the isco. The problem with the focus ring on the isco is that it has a cone shape so the focus gears tend to slide off. If you tighten the screw type gears to stop the sliding it makes the focus stiff. So I'm thinking gears with more surface contact area like the zacuto and redrock might work better.

The other problem with the screw type gears is that each screw pulls on the wall of the gear which affects the alignment and I've found it really hard to get a perfectly round smooth operating gear. The original cinevate design had a brass ring under the gear teeth so there was no flex problem but the new design is all plastic and flexes easily.
 
I was watching with great interest how much this one and it was incredible (and amusing) how much the price jumped in the last 20 minutes...
 
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