Cylindrical A-Lens Owner's Thread - Page 22 - AVS Forum | Home Theater Discussions And Reviews
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post #631 of 653 Old 05-09-2015, 12:00 PM - Thread Starter
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Quote:
Originally Posted by Eksohek View Post
has anyone tried a prime A-lens, say the ISCO III S/L on a native 4K projector, such as the Sony one with 2.35 content ?
All these posts have lots of info, but as they go far back, it's difficult to say if anything's been tested for 4K.


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I've went back and forth on this but after extensive testing with 4K downloads by way of sliding the lens in and out, I've gone back to leaving the lens in and scaling 4K. I see no resolution benefit, only the increase in light with the lens not in the light path on 16x9 compared to lens in and 16x9 scaled. Light is no longer an issue for me even with 3D due to the good light output at max zoom with my X500. I'm even more amazed by the 3L's transparency now. With the way things are appearing to play out this lens is going to be in my system for a long time to come.

Last edited by coolrda; 05-13-2015 at 09:24 PM.
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post #632 of 653 Old 05-11-2015, 12:32 AM
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thanks for the feedback. confirms my ISCO lens investment was good !
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post #633 of 653 Old 09-21-2015, 06:14 AM
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This thread hasn't been bumped in a while. Have A-lens owner's remained satisfied? Does true 4K change anything?

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post #634 of 653 Old 09-21-2015, 08:56 AM
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Quote:
Originally Posted by jh901 View Post
This thread hasn't been bumped in a while. Have A-lens owner's remained satisfied? Does true 4K change anything?
Some say yes, but it doesn't really change a thing for me. I love my ISCO IIIL and I don't think I'd ever get rid of it.
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post #635 of 653 Old 09-21-2015, 12:15 PM
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Originally Posted by Seegs108 View Post
Some say yes, but it doesn't really change a thing for me. I love my ISCO IIIL and I don't think I'd ever get rid of it.
Same for me (Panamorph). I'm answering here because your question seemed more anamorphic in general rather than specifically cylindrical.
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post #636 of 653 Old 09-21-2015, 02:16 PM
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Quote:
Originally Posted by jh901 View Post
This thread hasn't been bumped in a while. Have A-lens owner's remained satisfied? Does true 4K change anything?
Hasn't changed anything for me, I will never let my Isco IIIL lens go!
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post #637 of 653 Old 09-28-2015, 06:51 PM - Thread Starter
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Same here. As long as projectors use 16x9 chips I'll always use my lens. For everything. It doesn't matter the resolution or the projector, aspect ratio of content or source.
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post #638 of 653 Old 09-29-2015, 03:20 AM
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The same goes for me, I will never (never say never ) let go of my Isco 4XL and Cineslide.

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post #639 of 653 Old 09-29-2015, 08:37 PM
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I feel the same about my cylindrical lens. It is here to stay.

It seems some of the 4K SONYs have a 17:9 imaging chip, but they can be switched back to 16:9 for use with the 1.33x lens. The full 17:9 chip requires a 1.25x lens. I'll be staying with 1080 for a while yet, though I do believe my lens will pass the full detail of UHD when I eventually make the upgrade.

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post #640 of 653 Old 09-29-2015, 08:37 PM
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Double post

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post #641 of 653 Old 09-29-2015, 10:09 PM
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Quote:
Originally Posted by CAVX View Post
I feel the same about my cylindrical lens. It is here to stay.

It seems some of the 4K SONYs have a 17:9 imaging chip, but they can be switched back to 16:9 for use with the 1.33x lens. The full 17:9 chip requires a 1.25x lens. I'll be staying with 1080 for a while yet, though I do believe my lens will pass the full detail of UHD when I eventually make the upgrade.

Are there any 1.25x lenses available for HT?


I have tried the full chip on my VW1100 with my Isco IIIL lens and the image is wider than my scope screen, if one was to use it this way is the image distorted in anyway?

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post #642 of 653 Old 09-30-2015, 02:54 AM
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There are some 1.25 stretch ISCO lenses out there - I think ISCO DCI lenses, but they don't come up that often on ebay.

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post #643 of 653 Old 09-30-2015, 03:13 AM
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I have a ISCO 1.25 DCI Lens in Front of my VW 1100 works perfect together.
The Ring of Lens match in the Projector Frontring...like is made for this.
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post #644 of 653 Old 09-30-2015, 09:21 AM
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Quote:
Originally Posted by RapalloAV View Post
Are there any 1.25x lenses available for HT?


I have tried the full chip on my VW1100 with my Isco IIIL lens and the image is wider than my scope screen, if one was to use it this way is the image distorted in anyway?
Isco Cinema DLP 1.25x commercial lens. Lists for $17k. Just installed a pair of them on a Sony 1100 double stack not long ago. Nice lens.
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post #645 of 653 Old 09-30-2015, 06:06 PM
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Not a cylindrical, but on the subject of 4K affecting A-lens ownership....

I love my Panamorph A-lens, but my JVC projector gives me 4K-like pixel density and if I didn't need the A-lens to get the image width I require, I would sell it. (Same would go if I had a cylindrical, lens). I doubt a projector will come out any time with a significantly wider zoom ratio than my JVC, so I'll be needing my A-lens as far into the future as I can see. Luckily the A-lens allows for excellent quality images.
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post #646 of 653 Old 10-01-2015, 03:52 AM
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Quote:
Originally Posted by RapalloAV View Post
Are there any 1.25x lenses available for HT?


I have tried the full chip on my VW1100 with my Isco IIIL lens and the image is wider than my scope screen, if one was to use it this way is the image distorted in anyway?
I just sold my Isco Cinema DLP 1.25x lens for 3500$, and it was in almost perfect condition. I now use a Isco 4XL with my X500.

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post #647 of 653 Old 10-21-2015, 09:29 PM - Thread Starter
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Originally Posted by Andreas21 View Post
I just sold my Isco Cinema DLP 1.25x lens for 3500$, and it was in almost perfect condition. I now use a Isco 4XL with my X500.
Now if someone could jailbreak my Roku 4 so I could watch 4K movies. Was hoping for 4K/60 sync like I get with the Oppo 103D at least for unprotected 4K content.
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post #648 of 653 Old 10-23-2015, 07:29 AM
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I'd be careful what you decide to watch. Always check IMDB technical info to see what's actually mastered in 4K because Edge of Tomorrow only has a 2K digital intermediate, which means the "4K" version you'd stream is simply upscale 2K.
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post #649 of 653 Old 11-02-2015, 03:54 AM
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Quote:
Originally Posted by RapalloAV View Post
Are there any 1.25x lenses available for HT?


I have tried the full chip on my VW1100 with my Isco IIIL lens and the image is wider than my scope screen, if one was to use it this way is the image distorted in anyway?
No "HT" lenses as far as I know. The ISCO lens is made for the D-Cinema projectors because they are 2048 or 4096 wide, not 1920 or 3840 wide.

I did discuss the possibility of getting 1.25x optics made with the supplier of the lenses in my A-Lens, but nothing came of that. It would be an awesome option to have though.

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post #650 of 653 Old 11-02-2015, 05:48 AM
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Yes, the "Cinema DLP lens" made by Isco (now Schneider). Just installed a pair of them with a Sony 1100 double stack recently. Very expensive. You see them on eBay in questionalbe condition about once or twice a year. You can get them new from me. We have to make the lens mount for them though which is also expensive.

Here's an old photo with a discontinued lens mount. I make a replacement now that's better.




Here's a photo of the Sony 1100 doublestack rack (partially filled).





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post #651 of 653 Old 11-02-2015, 12:11 PM
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GetGray,

Can you manage to match the precision and clarity of a single Sony 1100 when you double stack them? I'd imagine it would be tough to impossible to get them perfectly aligned.
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post #652 of 653 Old 11-02-2015, 01:04 PM
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It was tough, but they are aligned. The stand was designed to accommodate fine adjustments and be rock solid stable once aligned. Room to change bulbs on both PJ's without disturbing them. Ken Whitcomb did the install. It's even setup to account for thermal variations as the unit warms up. The nice thing about lenses is they don't change. This would be impossible with lens memories.
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post #653 of 653 Old 11-02-2015, 08:48 PM
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