UH 480 or HD 6000? - AVS Forum
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post #1 of 8 Old 12-09-2012, 11:19 AM - Thread Starter
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I am currently using a Prismasonic 1400 with front element. I am looking to upgrade from this lens to improve focus at the edges of the screen when 2.35 content is being shown. The 1400 I am using is also a bit too small for my set up / projector.

I was looking at the two lenses noted in the subject line, primarily from a price perspective. I am not sure which one would be the better choice for my particular set up. I might also add that I will more than likely move to a 4K set up in the next two years.

I am currently using a Sony VPL 95 and a Lumagen XS 3D. I leave the lens in place and use the XS to change aspect ratios. My screen is a 2.35 Firehawk, 96" wide and the projector is 12.5' away from the screen.

Thanks in advance for your advice.
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post #2 of 8 Old 12-10-2012, 12:05 PM
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Hi Drew, give us a call and we can go over the options.

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post #3 of 8 Old 12-16-2012, 08:58 AM - Thread Starter
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Has anyone compared these two?
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post #4 of 8 Old 12-17-2012, 09:18 AM
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Having a HD5000R, which is probably similar quality it's older brothers the FE1500/1400+FE, I wouldn't upgrade to another prism-based lens. Not because prism lenses are bad, but the FE-equipped Prismasonics are already at the upper end of the prism-lens food chain and I think you really need to go to a cylindrical lens for a substantial improvement. I think the UH480 would be a largely lateral move for you.

I think the real question for you (assuming an ISCO/XEIT/etc are not options) is, is the HD6000, being a cylindrical lens, a big enough improvement over what you have to justify it's cost.

See what an anamorphoscopic lens can do,
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post #5 of 8 Old 12-17-2012, 09:58 AM
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Been deliberately staying out of this thread since I am a representative for Panamorph, but I just wanted to point out that the UH480 is a cylindrical / prism hybrid, a design unique to Panamorph. It is not a simple prism based lens.

I have been there for two separate blind shootouts between an Isco III and a UH480. Viewers were asked to rate their preference with video content, and then with test patterns. With video content, the results were consistent with random chance. There was no clear preference for either lens. With test patterns, the Isco showed slightly less pincushion at certain throws than the 480 (slightly less than 1/8 of an inch with a 16.5' throw to a 144" diagonal 2.35:1 screen), but most thought the 480 had slightly better contrast. Everyone agreed that the lenses were equally sharp edge to edge.

I have not seen the 6000, so can't comment upon it. There is one factor here in its favor, in that your projector is 12.5' away from the screen. The absolute sweet spot of the UH480 is 14.5 - 17.5 feet, and you are slightly closer than that. Our testing of the UH480 shows that its true usable range is about 12 - 20 feet with no notable loss of sharpness with standard video content, but if you were to bring up a test pattern that resolved single pixels and got up close to the screen, you might notice a slight softness.

I see that the HD6000 can supposedly focus down to two meters. If that is indeed the case, you might see a slightly sharper image with it at the pixel level. I do want to point out, though, that even though certain pure cylindrical lenses have a variable focus vs. the fixed focus of the UH480, it is also true that every lens has a specific sweet spot in which it works best. Having a variable focus just means that you can get more satisfactory results even if you navigate away from that sweet spot. With the UH480, the lens can have a variety of sweet spots depending on what throw we build it for. The stock UH480 has a sweet spot of 14.5 - 17.5 feet. We can build one with a different sweet spot, but it does add $1K to the price of the lens.

I can say this definitively - the UH480 has pin-sharp focus out to the edges of the screen, so if that is your concern the UH480 should solve that problem for you.


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post #6 of 8 Old 12-17-2012, 01:18 PM
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Quote:
Originally Posted by John Schuermann View Post

Been deliberately staying out of this thread since I am a representative for Panamorph, but I just wanted to point out that the UH480 is a cylindrical / prism hybrid, a design unique to Panamorph. It is not a simple prism based lens.
I have been there for two separate blind shootouts between an Isco III and a UH480. Viewers were asked to rate their preference with video content, and then with test patterns. With video content, the results were consistent with random chance. There was no clear preference for either lens. With test patterns, the Isco showed slightly less pincushion at certain throws than the 480 (slightly less than 1/8 of an inch with a 16.5' throw to a 144" diagonal 2.35:1 screen), but most thought the 480 had slightly better contrast. Everyone agreed that the lenses were equally sharp edge to edge.

I haven't seen the 480, but your comments don't surprise me. My HD5000 is quite good with very good sharpness and CA performance across the screen. I've somewhat come to the conclusion personally, that the real benefit of a true cylindrical lens is the ability to adjust astigmatism/focus to perfectly match your throw where with a prism based lens like the UH480/HD5000 you have no adjustment. I would expect the difference in performance to increase as you move away from the prism lens's focal plane/sweet spot.

Which is really my point if you've already got a coated/CA/focus/astigmatism corrected prism based lens, I think the move to any other such lens, even if it is better, would be largely a lateral move. The biggest step on the anamorphic lens quality curve is going from basic prisms, to something with CA/focus/astigmatism correction. Beyond that I think the next biggest jump is probably to going to a true cylindrical with adjustable focus.

See what an anamorphoscopic lens can do,
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post #7 of 8 Old 12-17-2012, 01:28 PM
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Quote:
Originally Posted by stanger89 View Post

Which is really my point if you've already got a coated/CA/focus/astigmatism corrected prism based lens, I think the move to any other such lens, even if it is better, would be largely a lateral move. The biggest step on the anamorphic lens quality curve is going from basic prisms, to something with CA/focus/astigmatism correction. Beyond that I think the next biggest jump is probably to going to a true cylindrical with adjustable focus.

I would pretty much agree with that statement smile.gif Well, perhaps I would make just one tiny modification. If you have a lens like the UH480 with CA/focus/astigmatism correction, there will be little value to upgrading to a lens with variable focus unless you are operating outside the sweet spot of your existing lens. Unless you move often, focus is something you set up essentially once, and it is possible to order a lens fine tuned to your install location from certain manufacturers.


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post #8 of 8 Old 12-18-2012, 08:25 AM - Thread Starter
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Thank you both for the input. It is very helpful.
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