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Tito Ferradans

The Diopter Thread.

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28 minutes ago, Bioskop.Inc said:

depends on the sensor size really, but i've not really suffered from it using on either S16 or S35.

What do you use & I can check about how wide you can go before any vignetting.

I barely use Full-Frame. Mostly S35 like Ursa Mini, RED etc. Thanks for your answer, helped a lot!

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15 minutes ago, FelixLöchel said:

I barely use Full-Frame. Mostly S35 like Ursa Mini, RED etc. Thanks for your answer, helped a lot!

On S35 the 82mm diopter vignettes with 35mm lens, but you're fine from about 40mm upwards (no problems with a 50mm lens). I mostly shoot S16 now, so no problems at all & don't have to worry about vignetting anymore. These adaptors are better with longer focal length lenses anyway, as you'll get the classic skewed edges with a lot of 35mm lenses - so if you need to get close ups, with a longer focal length, you'll have the added advantage of not getting right in the face of any talent.

Hope that helps - just remember the big Angenieux diopters (think they're 102mm, but again not sure if they ever made them under +1) & the Voigtlander Focar A&B 95mm (but they're +1 & +2 - the +1 is very useful)

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There has been a recent crop of big diopters on eBay so I'm sharing here the ones I found. :)

Canon 105CL-UP900H - 105mm +1.1 - $280 - https://ebay.to/2JeoDnX
Canon 105CL-UP900H - 105mm +1.1 - $350 - https://ebay.to/2kKODg7
Canon 82CL-UP800H - 82mm +1.25 - starting at $75 - https://ebay.to/2JckUeA

Canon 82CL-UP800H - 82mm +1.25 - $100 - https://ebay.to/2sFp6IH (3 available)
Canon 82CL-UP1300H - 82mm + 0.7 - $130 - https://ebay.to/2xGp7C4
SLR Magic duo 77mm +0.33 and +1.33 Achromatic - $200 - https://ebay.to/2Ligdg6
Minolta 72mm + 0.33 Achromatic - $350 - https://ebay.to/2kMFMuj

And I got a few myself I'm letting go:

Minolta 72mm +0.33 Achromatic - $350 - https://ebay.to/2JfpB3s
RedRock Micro 72mm +10 Achromatic - $165 - https://ebay.to/2sttk71
Fujinon 8072 72mm +1.25 CRACKED - $30 - https://ebay.to/2Hg8NaB

The 105mm are quite rare and work with a great number of high-value lenses recently like the Iscorama 54, or the Rectilux HCDNA for that little bit closer focus and can also be wedged in front of the LA7200, so I don't expect these to last long.

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Hi... If there's nothing readily available around 165mm  (6 1/2 inches), you could probably adapt a large diameter achromatic objective to work for you. I checked a 2013 Edmund Optics catalog but they had nothing larger than 128 mm, and those were very expensive ... $1,200 in the mounted version. Buying a used telescope (refractor) and using the objective might work. Or... contact an optics manufacturer like this one (old link) http://www.dgoptical.com/objective.htm and describe what you need. Prices are hair-raising, so the best might be to find a used consumer-grade telescope that "needs work" (affordable), with an objective as large as you need, the longer the focal length, the better.

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You may get a better response rate to your question, if you ask this same question in the main Anamorphic section instead of this “Diopter Thread”.

As for single focus solutions there are a few these days to choose from. Of course just make sure they are the proper size for your anamorphic front.

Here is one version to check into as a possible option to explore:

Rapido Front Variable Diopter 16A (FVD-16A) , $550

http://www.rapidotechnology.com/products-services/front-variable-diopter-fvd

More Info

https://www.youtube.com/watch?v=EIY_RCKq_Rs

Anamorphic Comparison w/ the Rapido FVD-16A vs  Rectilux Hardcore DNA | with Kowa 16D & 16H Anamorphics

https://vimeo.com/277831080

 

As for the main “taking” lens to use that attaches to the camera, you can use the search option in the forum to find various discussions on that which would probably cover your needs. Here is also a link you may find helpful, as your particular anamorphic the Isco Ultra Star Plus which is mentioned there as well.

https://www.eoshd.com/comments/topic/20783-building-an-anamorphic-lens-kit/

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Hi guys,

I just bougth an SLR Magic Anamorphot 40 compact adapter 1.33x. The 'near / normal' focus ring on the end works quite well, but won't let me rack focus from far to to near objects in one go. So for that I would need a single focus solution. Now I know that SLR Magic itself offers the 'Rangefinder' which would solve all my problems, but from reviews and sample footage I know that this thing really deteriorates the image quality.

What else could I buy that would give me the abillity to have single focus (and preferably also offers closer focus) that doesn't impact the quality as much? The Anamorphot adapter has a 62mm filter thread. Is there a 'normal ' diopter that could just sit on the adapter 24/7? Or any other device such as the Rangefinder which would work?

Thanks!

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3 hours ago, Stab said:

Or any other device such as the Rangefinder which would work?

You can take a look at Rectilux's Hardcore DNA and Rapido's FVD-16A.

Both are just superb - there is almost none image degradation, even when you use your taking lens wide open. They are a bit pricier than Rangefinder, though (especially HCDNA).

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28 minutes ago, heart0less said:

You can take a look at Rectilux's Hardcore DNA and Rapido's FVD-16A.

Both are just superb - there is almost none image degradation, even when you use your taking lens wide open. They are a bit pricier than Rangefinder, though (especially HCDNA).

Thanks! I have heard about them. But I can't find if they will work with this adapter. This adapter has a front filter ring (62mm) and is very different from the old projector kind of anamorphics which require a 'clamp' to hold anything at the front end.

If anyone could shed some light on this that would be great.

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Both HCDNA and Rapido are quite heavy and that's why they are often mounted using clamps.

FVD-16A has a thread on its back - it's a 75 mm (female, and that's quite unusual since almost every filter has a male thread at the back) thread.

HCDNA - can't really say much about it because I've never considered it as an option, sorry.

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On 2/7/2019 at 9:30 AM, Tito Ferradans said:

You can get an adapter for the FVD that gives it 72mm threads, and then just use a step ring to connect it to the front of your 40-Compact. :)

Actually it's 77mm. Also, RAF Camera can make you a custom ring from the 75mm male to any size. He already has some in 62mm for the Bolex.

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