Iscorama Anamophic Lens Test

I got hold on a Isco Iscomorphot 8/1.5x and its very small and I assume that even if I find any step-up ring it will vignette alot. Or does anybody know anything about this lense adapter?
It has a focus ring which goes down to 0.5m.
 
nidas said:
I got hold on a Isco Iscomorphot 8/1.5x and its very small and I assume that even if I find any step-up ring it will vignette alot. Or does anybody know anything about this lense adapter?
It has a focus ring which goes down to 0.5m.
Click to expand...

What's the diameter of the rear thread? The isco 36 has a 49mm rear thread and starts to vignette on anything wider than 58mm on the 5D
 
my rear tread is something like 24 mm and my rear glass is about the same.. maybe 22mm. When I look at Iscorama 36 pics I can see that the rear glass diameter is much smaller than the rear thread while mine is about the same....
I can´t measure it exactly since I don´t have the right tools...

How big is the rear glass on a iscorama 36?
Should i try to find some stepup´s or something for this or is it a dead end is it to small?

Thanks for taking time to help!
 
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nidas said:
my rear tread is something like 24 mm and my rear glass is about the same.. maybe 22mm. When I look at Iscorama 36 pics I can see that the rear glass diameter is much smaller than the rear thread while mine is about the same....
I can´t measure it exactly since I don´t have the right tools...

How big is the rear glass on a iscorama 36?
Should i try to find some stepup´s or something for this or is it a dead end is it to small?

Thanks for taking time to help!
Click to expand...

I have 2 isco 36s one is about 22mm the other slightly larger so there's a chance that yours might work. Try holding it (carefully) in front of a 50mm lens. I'm not sure you can get 24mm step rings, you might have to get a machine shop to fabricate something.
 
Thanks Squig.. I found some step up rings from 24-37 and from 37-52 so I can use my nikon ai primes...
I held it up and its very hard to hold the camera and lense at the same time but I did saw some nice flares and squeesed picture..

I´ll guess I have to try the step up rings and hope for the best. Its cool since this focus down to 0.5 M.

My front end thread is 40mm so its a very small lense adapter...
Have to find a Isco 36 so I can start a Anamorphic project...
 
One small thing . . . . .

Mounting the (fast becoming a standard of sorts) Iscorama+Nikon 50mm f/1.8 on a 5D give you a 50mm F.O.V. (of course) . . . . but on a 550D this gives you a 80mm F.O.V.

Like I say, all pretty obvious and a small point to make, but now that I have a 550D it's like having two Iscorama focal lengths - a small bonus that comes with the 550D.
 
hmm I was to quick I need of course step down ring.. Has anybody seen any step down ring to 24mm?

I have seen some 52-37 and 37-27 and even 25 but not to 24mm.
 
Guys, I recently purchased an Isco 54 and I've noticed it doesn't flare quite as nice as Rich and others' footage. Could it be the coating on the Canon 50mm 1.4 I currently have it attached to?

Would older lenses be better for flares? Any recommendations?
 
Would older lenses be better for flares? Any recommendations?[/quote]

maybe but i would say you have a late generation isco lens,i have 2 54s about 15 years apart one has a very basic coating the 2nd has very modern looking coatings.
i also have a complete nikon isco with no flares at all,i think you should be thankful you have one.
if zeiss do sell a version you will get very nice flares for your $4000.
you could always do a saving private ryan and ask panavision to strip your isco coatings,or cheaper still get some acid and sand paper : )
 
Lee Wilson said:
One small thing . . . . .

Mounting the (fast becoming a standard of sorts) Iscorama+Nikon 50mm f/1.8 on a 5D give you a 50mm F.O.V. (of course) . . . . but on a 550D this gives you a 80mm F.O.V.
Click to expand...

Yes and no. 80mm vertically but it becomes 50mm horizontally once you stretch it in post.
 
nidas said:
Thanks Squig.. I found some step up rings from 24-37 and from 37-52 so I can use my nikon ai primes...
I held it up and its very hard to hold the camera and lense at the same time but I did saw some nice flares and squeesed picture..

I´ll guess I have to try the step up rings and hope for the best. Its cool since this focus down to 0.5 M.

My front end thread is 40mm so its a very small lense adapter...
Have to find a Isco 36 so I can start a Anamorphic project...
Click to expand...

The 36 starts to vignette wider than 58mm. I'm using a Russian Helios 44-2 they're very cheap on ebay but it's a great lens. The 0.5m focus is a big plus.

I've been promising to post some isco 36 footage for ages, here it is finally- http://www.vimeo.com/10175596

My 54 didn't flare as much as my 36s, it was a later MC version.
 
antiochuswilson said:
you could always do a saving private ryan and ask panavision to strip your isco coatings,or cheaper still get some acid and sand paper : )
Click to expand...

I want flares so bad, I'm actually considering that. Panavision sounds expensive though. Can you really do it yourself?

Would diopters make any difference?


Footage looks great, Squig!
 
Brandon Ruiz said:
I want flares so bad, I'm actually considering that. Panavision sounds expensive though. Can you really do it yourself?

Would diopters make any difference?

you have the beast 54 lens,the problem is massive front element,now using crap single element close up filters are going to give you crummuntic abomination distortion : ) ca as they say in hollywood.
so what you really need is an uncoated 95mm acromatic doublet diopter @ +0.5 power.
schneider or zeiss will do one for you but probably cost more cash than the isco.

stripping coatings off lens is very expensive especially non standard products,i was joking about the acid
if lack of flare is a killer,sell and look out for one of the smaller iscos or get a cheaper kowa..
Click to expand...
 
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squig said:
Yes and no. 80mm vertically but it becomes 50mm horizontally once you stretch it in post.
Click to expand...

Yeah, all that !!

The point is that having a second (cropped sensor) body, effectively gives you another focal length for the same lens set up.
 
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the older kowa and sankor are much more prone to flare with solid horizontal streaks that will vary in color and size depending on the model.
for instance, using the same flashlight my sankor 16c does multiple warm orange fine lines while the 16D is more into some purple bluish with added dotted blocks.
i would love others to report the effects they get as this really changes the look of the final images especially when aiming at sunset or cars passing by.
 
squig said:
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.
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Now i have tried the sgpro. The design is bad because the screw holes are between the teeth and so you have teeth gaps !!
Also if the pressure of the screws is not absolut identical the ring loose the round shape and focusing gets partially stiff !!

Now i´m a bit frustrated because you reported the cinevate also isn´t a solution. I won´t try the zip rings because i assume they can´t provide the necessary perfect round shape!?

Next would be a custom ring e.g. from this source:
http://www.jbkcinequipt.com/Video accessories cinema_quality.htm

79,-$ sounds good if quality is superior. The problem will be the conical shape.
I would send them my lens but from germany this will be a lot of hassle and wait.
 
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