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Post by Deleted on May 16, 2015 5:05:47 GMT -5
Hi I found out that my HFQ900 lenses that came with the Barco CineMax had some kind of reflection that mirrored white charcaters on a black background to the opposite edge.
Now after disassembling the lenses and comparing with my GT17 lenses I am pretty sure the part of the lens that is there to focus the corners has no coating. Whn I hold the GT17 part next to the HFQ part I see a blueish coating on the GT17 that is missing on the HFQ.
Is there anyone that knows of a way to coat glass? It does not have to be the best coating ever but something to try.
Second thing is that when I tried the GT17 they might even be sharper. I am not completely sure as it is difficult to do a good compare but my first impression was that they looked a little sharper. When I read the docs on these lenses comparing the HD10E to the HD10 GT17 it says the GT17 is for improved resolution!
HD10E – The HD10E covers 167mm focal length (7”) CRT raster diagonal. It was designed to provide good performance over the largest possible magnification range (14-45X). For this reason, CPL recommends the HD10E lens for applications where the intended screen size requirements may vary over this wide range (90” – 300” diagonal).
HD10GT17 – The HD10GT17 is designed for improved resolution over the HD10 lens over a specific magnification range. This lens provides excellent performance for magnifications of 14-20X. CPL recommends the HD10GT17 lens for applications requiring screen sizes of 100-140” diagonal.
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Post by gjaky on May 17, 2015 4:34:18 GMT -5
Anti reflective coating can only be made in (high) vacuum chamber, it is a kind of thin film process, certainly not a DIY project.
Hard to compare the lenses. It is widely known that even the same type of lenses tend to draw better with the newer manufacture (probably due to the improvement of the manufacturing processes). The GT17 is an older design than the HD10E, and in the text you quote it is compared against the plain HD10 lens which came out in ~'90-92. HD10E is the successor of the original plain HD10.
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Post by Deleted on May 17, 2015 6:50:29 GMT -5
Ok. I will do a more carefull compare between the lenses also looking at how the corner do MTF and focus. My GT17 came from a runco Curt said perhaps they selected them?
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Post by Deleted on May 17, 2015 7:09:00 GMT -5
But if you read the whole document it seems HD10 does refer to HD10E and HD10L.
The HD10 family of lenses has been designed to maximize performance and versatility for professional CRT projection video, data and graphics applications. All HD10 family lenses are optically coupled and designed to cover a full 178mm (7”) raster diagonal. They are all fully color corrected hybrid designs, incorporating both plastic and glass elements and share the same C-element and mounting geometry, making it possible to interchange the lenses on the same projector. The following is a brief description of lenses in the HD10 family.
HD10E – The HD10E covers 167mm focal length (7”) CRT raster diagonal. It was designed to provide good performance over the largest possible magnification range (14-45X). For this reason, CPL recommends the HD10E lens for applications where the intended screen size requirements may vary over this wide range (90” – 300” diagonal).
HD10L – The HD10L is designed for optimized performance for smaller screen sizes not covered by other HD10 family lenses. This lens provides excellent performance for a specific magnification range (9-13X). CPL recommends the HD10L lens for applications requiring screen sizes of 60-90” diagonal.
HD10GT17 – The HD10GT17 is designed for improved resolution over the HD10 lens over a specific magnification range. This lens provides excellent performance for magnifications of 14-20X. CPL recommends the HD10GT17 lens for applications requiring screen sizes of 100-140” diagonal.
HD10GT26 – The HD10GT26 lens is designed for improved resolution over the HD10E lens for magnifications of 21-30X. CPL recommends the HD10GT26 for applications requiring screen sizes of 150-200” diagonal.
HD10GT30-67 – The HD10GT30-67 is designed for improved resolution over the HD10E for magnifications of 30-45X and to extend the range of the family up to 67X. CPL recommends the HD10GT30-67 for high magnification applications requiring screen diagonals of 210-460”.
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Post by gjaky on May 17, 2015 7:25:35 GMT -5
This is mainly a marketing text, you can ride on words but it is better you believe your eyes, if the GT17 looks better use that, and do not choose your stuff based on what they wrote about it in the brochure...
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Post by Deleted on May 17, 2015 7:32:43 GMT -5
This is mainly a marketing text, you can ride on words but it is better you believe your eyes, if the GT17 looks better use that, and do not choose your stuff based on what they wrote about it in the brochure... Yes what made me doubt is that a person that has both the HD10E and the GT17 compared them very critical and he said the GT17 was better. He had bought a lot of HD10E so he had no reason for saying so. |
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Post by gjaky on May 17, 2015 8:47:28 GMT -5
HD10E found on Sony1292-s are not even considered the same as the later HD10Es found on the G90...
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Post by Deleted on May 17, 2015 9:04:33 GMT -5
HD10E found on Sony1292-s are not even considered the same as the later HD10Es found on the G90... Ok these where the HD10E found on the Marquee. My HFQ900 are really Barco. |
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Post by Casethecorvetteman on May 17, 2015 18:44:51 GMT -5
I have two sets of HFQ900 here, one set does what you said with reflections, and the other set does not.
The newer ones i have here have got a Delta sticker on them with all the details, just like the one seen on the HD-145s etc... The ones on my CineMAX only have a silver sticker saying HFQ900...
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Post by Casethecorvetteman on May 17, 2015 23:44:00 GMT -5
Here they are:  |
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Post by Deleted on May 18, 2015 11:28:07 GMT -5
I have two sets of HFQ900 here, one set does what you said with reflections, and the other set does not. The newer ones i have here have got a Delta sticker on them with all the details, just like the one seen on the HD-145s etc... The ones on my CineMAX only have a silver sticker saying HFQ900... That is weired. I was supprised that there was no coating at all on the corner adjust part of the lens. If someone used wrong cleaning methods some of the coating should have stayed. I have the same golden sticker saying barco HFQ900HM. Perhaps they replaced the front end with corner focus with wrong units? I have detached those front ends end I think I can fit the GT17 front on the HFQ. Not sure if that will be better. if you want to confirm you could compare the front end parts for coating. |
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Post by Casethecorvetteman on May 18, 2015 22:48:39 GMT -5
There is a coating on the outside of both, but not sure about the inside
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Post by Deleted on May 19, 2015 3:55:13 GMT -5
There is a coating on the outside of both, but not sure about the inside Is difficult to see when not taken apart. When I took the front off it became clear that it is not coated in and outside. Still this is a very strange thing I have no idea how this is possible. |
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Post by Casethecorvetteman on May 19, 2015 5:09:01 GMT -5
I can tell its on the outside due to the way it looks when you get finger prints on it. I havent taken them apart though.
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Post by km987654 on May 23, 2015 4:43:00 GMT -5
HD10E found on Sony1292-s are not even considered the same as the later HD10Es found on the G90... The 1292 and the G90 both had HD10F lenses. The G90 had a later version that is superior to the lenses from the 1292. I am not aware that the G90 ever had HD10E unless modified by the owner. |
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