Archived posting to the Leica Users Group, 2004/10/15

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Subject: [Leica] No Crop Factor
From: john.nebel_lug at csdco.com (John Nebel)
Date: Fri Oct 15 06:34:47 2004
References: <003901c4b25f$b4150450$6401a8c0@ccapr.com> <7D1424A6-1E56-11D9-A593-003065D5F760@earthlink.net> <FFD94CD1-1E61-11D9-A1D1-000A95CD9BF8@mac.com>

Marc,

Sinar uses a Kodak 49 x 36.7 mm sensor in the 54 backs, but they are a 
somewhat esoteric pieces of equipment.

This apparatus - how else to describe it, I don't know - can be used in 
a Sinar M camera and presumably with Leica lenses.

The quality of the images is astounding.  I've been using the backs on a 
copy stand for numismatic photography in 16-shot mode which gives twice 
the resolution and twice the color depth, 8k x 11k pixels with 14-bit 
color.  Stitching does take a bit of computer time.

see http://www.sinar.ch

John Nebel

Marc Attinasi wrote:

> Does anyone know if there have been attempts, by any manufacturer or 
> researcher, to use two or more chips to cover the 24 X 36 frame? My 
> educated guess is that stitching multiple images together is not hard - 
> it could be done on camera or in the computer, but I have no idea about 
> the other aspects, like exposure timing, physical alignment of the 
> chips, etc. Anyway, it seems like a good alternative to large, expensive 
> full-frame sensors, at least in theory. I have read that the expense 
> associated with large sensor chips is largely related to the reject 
> rates - larger chips have more potential for manufacturing error.
> 
> - marc
> 
> On Oct 14, 2004, at 8:01 PM, feli wrote:
> 
>> Well, contrary to popular opinion, I'm going to make a wild guess here 
>> and
>> say that some preliminary research has been going on for a few years.
>> I really don't think they are a complete bunch of idiots. For one 
>> thing I believe
>> that they feel that it has to be full frame, and it's really only been 
>> in the last
>> year that full frame chips have matured and come down enough in price
>> to make it a viable option for them. I think they can scrape by for 
>> another
>> year and half and well see something quite good. I downloaded the hires
>> test images from the R-Module and they look pretty damn good. If the high
>> ISO pics hold up they may have something really special.
>>
>> Feli
>>
>> On Oct 14, 2004, at 7:35 PM, B. D. Colen wrote:
>>
>>> If they don't get it right with the digital R and sell a boat load of
>>> them they won't be around to produce the digital M. They're already
>>> losing money, and the R line has been a loser for a number of years. So
>>> they're not in a position to screw around. If they'd been smart, they
>>> would have started work on the digital M back when Cosina reportedly did
>>> - rather than tell everyone that such a camera was an impossibility -
>>> and have it out by now. Because the M is where the potentially huge
>>> market is. But that would have taken a modicum of marketing savy. ;-)
>>
>>
>>
>> ________________________________________________________
>> feli2@earthlink.net                               www.elanphotos.com
>>
>> _______________________________________________
>> Leica Users Group.
>> See http://leica-users.org/mailman/listinfo/lug for more information
>>
> 
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information


In reply to: Message from bdcolen at earthlink.net (B. D. Colen) ([Leica] Say Hello to Hermes Leica AND crop factor)
Message from feli2 at earthlink.net (feli) ([Leica] Say Hello to Hermes Leica AND crop factor)
Message from attinasi at mac.com (Marc Attinasi) ([Leica] No Crop Factor (was: Say Hello to Hermes Leica AND crop factor))