A 36mm x 24mm sensor would be nice, but what about using a smaller sensor
and some glass to compress the 24x36 image onto it? Or how about an array
of smaller CCD sensors and, if needed, some optics to direct the image away
from the seams?
If you're putting an LCD preview screen on the thing, then why are we
talking about a camera _back_? Just build it in your favorite box and put a
Pentax lens mount on the front. If resonably priced, it might get an even
larger market by allowing other lens mounts to be put on the box too.
BTW, if building it in a box with a lens mount, and putting in optics, then
might as well go the multiple sensor route for better image quality.
BTW, for those intersted in the astro cameras, try these links:
http://www.willbell.com/ccd/ccd5.htm (review of book on how to do it --
this seems to be _the_ resource on this stuff as many other web pages refer
to it)
http://www.wvi.com/~rberry/cookbook.htm
http://home.t-online.de/home/mrimkus/ng_cook/ngcbmain.htm
FWIW, I was thinking more along the lines of an open design, DIY project
with the initial design making cost tradeoffs more toward buildability and
affordability than for maximizing quality. Whichever works though.
later,
patbob ([EMAIL PROTECTED] [EMAIL PROTECTED])
"Philippe Trottier" wrote:
> Components list for Pentax CCD back
>
> - -Pentax back LX and MX for me ... what else ???
> - -Power supply
> Linear tech has a cool 90% efficiency power supply for 2
> x AA let's
> make
> it 4 AA with a hand pack ???
>
> - -Mass storage
>
> - -CCD
> Ok guys start your search engine... I only found some sony and
> National
> small size sensors so far.. help me there.
>
> - -LCD
> How about a color TFT ?? www.sharpmeg.com LQ038Q5DR01
> 3.8" 450nits
> 320x240 (4:3)
>
> Hey albano, can you make a survey =)
>
> CCD back interest ?
> How much of the frame is acceptable ? 50% 60 % 70% 80%
> 90% 100% ??
> Camera Frame ? PZ-1, MZ-?, LX, MX, KX, ME, Program, ????
> Minium interesting resolution ? 1024x768 ? 1280x960 ?
> Price range ?
> Mass storage ? Compact flash, MMC, Smart Media (see
> www.sandisk.com)
>
> Anyone interested by doing a cheap version low res 1st
> and then make
> a
> 2nd run with high res when we get some experience ?
>
> I calculated my design costs to be around 12000$US for
> hardware and some
> 7000-9500$US for software...
> hardware sample (one unit) will chirp around 2000$US, I am
> ready to cut
> about 30% because it's more of a hobby than real work...
>
> as an incentive I can say that those who chip in for the design cost
> will
> have a return on other unit sold afterward ...
>
> production cost ... depends on the product selected... and I
> am waiting
> for
> some price quote from Sharp, Linear tech and couple of other folks...
>
> Phil
>
>
> > It is actually quite a bit behind the times. It has no features to
> > speak of, low resolution, requires external (proprietary) devices to
> > view/load/ download images, and is very expensive to boot.
> I'm afraid
> > that this project will be DOA. The only way that this could
> be viable
> is
> > if you could replace the entire camera back. This way, it might be
> able
> > to take advantage of some of the positives that digital photography
> > offers by incorporating an LCD screen. I used to think that the
> "digital
> > film" thing was a good idea until I used some real digital cameras.
> >
> > Isaac
> > >
> > > Nick
> > >
> > > __________________________________________________
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> > > http://buzz.yahoo.com/
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