Projector recommendations

Discuss about cameras, projectors, calibration panels, turntables etc.
DenKor
Posts: 11
Joined: 07 Jan 2019, 16:34
Location: Russia

Re: Projector recommendations

Post by DenKor » 14 May 2019, 08:28

Micr0 wrote:
13 May 2019, 20:49
DenKor wrote:
13 May 2019, 10:01
Hello! I have LG PF1500G (06/2018). Minimum focal length is 29cm with 21*12cm pictures size.
If I need to reduce the focal length, I can use lenses in front of the projector (Macro Close Up Lens filter +1+2+4+10 for Nikon from aliexpress). For example with a +2 lens, I can get 20cm focal length with 15*8.5cm picture size.
photo_2019-05-13_13-00-49.jpg
I tried those macro lenses on my pf1500 too but found they introduced too much distortion to be useful. The error in calibration when way above acceptable values. What types of RMS values are you getting after calibrating with one of those lenses? Even still I found the 52mm adapter ring I mounted to the projector lens to be very useful for adding ND filters for scanning small objects. I like running the projector brightness in David at at least 200 as to have some range to dim and brighten during scanning to reduce hot spots.
I ordered a new camera on a chip imx265 and new 12 mm 5mpx c-mount lens and I'll try with them when they come. after the experiments will tell you the results.

In Russia, one person tried these lenses in front of the projector to scan coins.
CBDC081C-A1CF-41CA-BAE9-6D2836277203 (1).png

mading
Posts: 97
Joined: 31 Jan 2017, 13:09

Re: Projector recommendations

Post by mading » 15 May 2019, 10:59

illbefucd2 wrote:
14 May 2019, 00:39
Having trouble finding a LG PF1500
As they are discontinued. Any other suggestions ??
Amazon has a few of it, In Italy:
https://www.amazon.it/LG-Minibeam-Proie ... 168&sr=8-1

User avatar
Micr0
Posts: 338
Joined: 15 Nov 2016, 15:20

Re: Projector recommendations

Post by Micr0 » 16 May 2019, 02:30

DenKor wrote:
14 May 2019, 08:28
Micr0 wrote:
13 May 2019, 20:49
DenKor wrote:
13 May 2019, 10:01
Hello! I have LG PF1500G (06/2018). Minimum focal length is 29cm with 21*12cm pictures size.
If I need to reduce the focal length, I can use lenses in front of the projector (Macro Close Up Lens filter +1+2+4+10 for Nikon from aliexpress). For example with a +2 lens, I can get 20cm focal length with 15*8.5cm picture size.
photo_2019-05-13_13-00-49.jpg
I tried those macro lenses on my pf1500 too but found they introduced too much distortion to be useful. The error in calibration when way above acceptable values. What types of RMS values are you getting after calibrating with one of those lenses? Even still I found the 52mm adapter ring I mounted to the projector lens to be very useful for adding ND filters for scanning small objects. I like running the projector brightness in David at at least 200 as to have some range to dim and brighten during scanning to reduce hot spots.
I ordered a new camera on a chip imx265 and new 12 mm 5mpx c-mount lens and I'll try with them when they come. after the experiments will tell you the results.

In Russia, one person tried these lenses in front of the projector to scan coins.
CBDC081C-A1CF-41CA-BAE9-6D2836277203 (1).png
That's very good detail. Where the problems show up is when you try to align multiple scans. you will see that they don't completely align, with edges being more of a problem. Keep us posted.
µ

mading
Posts: 97
Joined: 31 Jan 2017, 13:09

Re: Projector recommendations

Post by mading » 21 May 2019, 07:16

I saw an interesting 1920*1080 projector from LG:
https://www.projectorcentral.com/LG-PF50KA.htm

did anybody tried it, or know if it's square pixels?

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Micr0
Posts: 338
Joined: 15 Nov 2016, 15:20

Re: Projector recommendations

Post by Micr0 » 21 May 2019, 14:57

mading wrote:
21 May 2019, 07:16
I saw an interesting 1920*1080 projector from LG:
https://www.projectorcentral.com/LG-PF50KA.htm

did anybody tried it, or know if it's square pixels?
When I was researching projectors I was able to find specifications regarding DLP DMD orientation, however is seems that most DMD chip makers are going with the diamond pattern as it allows for smoother gradients and dithering which are advantages in home projectors showing movies. That said I also when to a couple of local retailers (Im in NYC so there are a few show rooms) and actually when through their display units and looked at the DMD pattern and the focal distances. The LG was the best compromise in an HD projector at the time. We've been wanting to replace the LCD TV in the living room with a projector for a while and I have been thinking at looking into some of the new 4K offerings. If I find anything good I'll post. In the meantime perhaps you can find a PF1500 on ebay? The square pattern helps, but I don't think it is worth killing your self to find. If you can order from Amazon, Newegg, or B&H you can try a number of projectors and return them if they don't suit your needs.
µ

illbefucd2
Posts: 20
Joined: 26 Feb 2018, 06:18

Re: Projector recommendations

Post by illbefucd2 » 22 May 2019, 10:49

Thanks Micr0, Nice information you pass on.thanku
just got one off ebay.
Hope its ok.......will keep u posted

I have also a Artec Eva but find its not that good smaller parts.
The spider would be great ... but cant see any that come up second hand .. :(

illbefucd2
Posts: 20
Joined: 26 Feb 2018, 06:18

Re: Projector recommendations

Post by illbefucd2 » 23 May 2019, 11:53

looks like the one i got will do.
Is it possible to pass on your camera settings ?
Would be much appreciated.
Thanks :)

illbefucd2
Posts: 20
Joined: 26 Feb 2018, 06:18

Re: Projector recommendations

Post by illbefucd2 » 23 May 2019, 11:58

DenKor wrote:
13 May 2019, 10:01
Hello! I have LG PF1500G (06/2018). Minimum focal length is 29cm with 21*12cm pictures size.
If I need to reduce the focal length, I can use lenses in front of the projector (Macro Close Up Lens filter +1+2+4+10 for Nikon from aliexpress). For example with a +2 lens, I can get 20cm focal length with 15*8.5cm picture size.
photo_2019-05-13_13-00-49.jpg
How do you fit the lens ? do you have reference numbers i can look them up ?
I just purchased same projector and i would like to try
Thanks

DenKor
Posts: 11
Joined: 07 Jan 2019, 16:34
Location: Russia

Re: Projector recommendations

Post by DenKor » 25 May 2019, 17:25

I bought them here (55mm):
https://s.click.aliexpress.com/e/buIW09A6

I am fixing them with adhesive tape, but this is not a successful solution. In the future I will print on the 3D printer a normal mount.
To my shame i still haven't checked RMS with this lens.

illbefucd2
Posts: 20
Joined: 26 Feb 2018, 06:18

Re: Projector recommendations

Post by illbefucd2 » 26 May 2019, 11:49

Thanks i appreciate the info.

Could anyone care to share their camera settings?

PLEEEEEESSSEEEE : :D

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