toguko
7-Apr-2014, 06:04
I am looking for lens that would cover 1700mm at infinity. Obviously these kind of photographic lenses don't come cheap (if you can find one). A friend of mine suggested I try rear projection tv lenses. I thought if they can cover 60 inch tv screen, maybe they would be good. But I can't find any information about focal lengths, view angles nor image circles for them. I was wondering if anyone played with one of these and could tell me more about them.
I saw this thread and it's kind of promising:
http://www.largeformatphotography.info/forum/showthread.php?83715-The-fastest-4x5-camera-ever!!!
and here are some examples I have in my mind:
http://www.ebay.com/itm/Set-of-3-Delta-78-Projection-Lenses-for-Rear-Projection-TV-U-S-Precision-Lens-/111312040406
http://www.ebay.co.uk/itm/Barco-Data-701-CRT-Projector-with-Delta-HD-6C-ML-Lenses-/281264915704?nma=true&si=lLkzrpBkMzXqauZR%252FVCSkxA6ISA%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
http://www.ebay.co.uk/itm/BARCO-CLM-DLP-PROJECTOR-LENS-ZOOM-QCLD-1-1-1-3-1-R9849850-/190836649482?pt=US_Projector_Parts_Accessories&hash=item2c6ec02e0a
http://www.ebay.co.uk/itm/Barco-R9849850-QCLD-1-1-1-3-1-High-Quality-Projector-Zoom-Lens-Gorgeous-Glass-/231195208194?pt=US_Projector_Parts_Accessories&hash=item35d44eea02
I would appreciate any constructive information.
I saw this thread and it's kind of promising:
http://www.largeformatphotography.info/forum/showthread.php?83715-The-fastest-4x5-camera-ever!!!
and here are some examples I have in my mind:
http://www.ebay.com/itm/Set-of-3-Delta-78-Projection-Lenses-for-Rear-Projection-TV-U-S-Precision-Lens-/111312040406
http://www.ebay.co.uk/itm/Barco-Data-701-CRT-Projector-with-Delta-HD-6C-ML-Lenses-/281264915704?nma=true&si=lLkzrpBkMzXqauZR%252FVCSkxA6ISA%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
http://www.ebay.co.uk/itm/BARCO-CLM-DLP-PROJECTOR-LENS-ZOOM-QCLD-1-1-1-3-1-R9849850-/190836649482?pt=US_Projector_Parts_Accessories&hash=item2c6ec02e0a
http://www.ebay.co.uk/itm/Barco-R9849850-QCLD-1-1-1-3-1-High-Quality-Projector-Zoom-Lens-Gorgeous-Glass-/231195208194?pt=US_Projector_Parts_Accessories&hash=item35d44eea02
I would appreciate any constructive information.