Re: Re: [APML] OT: CCD sensitivity [was: first CCD images]

[Philip Perkins <philip@astrocruise.com>]

Loke,

I see the same thing with my CCD shots - while Rob Gendler (and possibly 
others) use a technique of recording bright stars more accurately, it is at 
the expense (I believe) of the very faint detail.  I think that CCD 
technology needs to evolve a stage further in order to record bright stars 
properly.  I see the same effect with my Canon digital camera - bright 
reflections look artificial, direct light sources in the scene cause 
problems, as do sunset scenes, etc.  It's a great camera and I use it a lot 
but the technology isn't there yet to record bright light sources without 
various artefacts (ante-Webster) appearing in the image.

--Philip


At 21:08 25/03/02 -0500, you wrote:
>Philip,
>
>   My thoughts are similar to the ones you have just expressed. Also, 
> unfortunately, I cannot prove this. Interestingly the CCDs linear 
> response can also be a disadvantage when bright stars are in the field 
> and cause blooming. These can be a real nuisance in widefield CCD shots. 
> Two widefield taboo CCD objects are the Pleiades and Rho Ophiuchus. I 
> think Malin's Rho Ophiuchus film shot is still unbeatable.
>
>Loke


Philip Perkins - philip@astrocruise.com
Wiltshire UK & Luberon France
Astrocruise - http://www.astrocruise.com


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