Re: Canon's new astrophoto DSLR announced

To which I have to disagree with. I see them as filling in capability easier
than another technology. In the case of DSLRs it's wide field coverage. With
dedicated cooled CCD cameras it's faint objects. With web cameras it's high
resolution planet, lunar, and solar imaging. The advantages and disadvantages
of each camera fit in well with these general categories. It doesn't mean you
can't to DSOs with a DSLR, planet imaging with a dedicated cooled CCD camera, et
al. But would involved more work and effort to achieve the same results.

--- Dave
--
----------------------------------------------------------------------
Pinprick holes in a colorless sky
Let inspired figures of light pass by
The Mighty Light of ten thousand suns
Challenges infinity, and is soon gone

david.nakamoto@xxxxxxxxxxx


"Tim Killian" <TJK@xxxxxxxxxxxxxxxxxx> wrote in message
news:R9KdnZUMhcIuuzzfRVn-qg@xxxxxxxxxxxxxx
> Yes, the dedicated, cooled CCD cameras with their 16 bit A/Ds will always
> outperform one of these DSLRs. But there is more to life than the faintest
> parts of faint fuzzies, and only so many hours in a day for people who image
> as a hobby. These DSLRs add an amazing level of technology and automation to
> the process which ends up saving users time and frustration. That IMO is their
> biggest advantage.
>
>
> David Nakamoto wrote:
>> Thanks for that information Jim. Seems some people look at the Canon camera
>> and them make assumptions about it that show a lack of understanding of how
>> the technology works. Knowing that a noise reduction algorithm is applied by
>> the camera itself under some circumstances is a vital piece of information to
>> judge how well it might do on various astronomical objects.
>>
>> People don't seem to appreciate that astronomy imaging uses any camera to
>> image something MUCH fainter than even twilight lighting conditions give. A
>> way to see this is to put your hand at the focus point of a small telescope
>> that pointed at Jupiter or even the Moon, and comparing that with the light
>> from a small flashlight. And these are the brighter astronomical objects.
>> You can't even see the DSOs on your palm doing this.
>>
>> Since DSOs typically occupy the lowest 10% or less of the brightness scale on
>> any image, right where the noise is, Canon's method of reducing the noise
>> means you're going to lose detail and definition on DSOs, especially in the
>> fainter regions.
>>
>> But as I and others have pointed out, these cameras are obviously NOT meant
>> for dedicated DSO work, but as dual purpose cameras to get one's feet wet in
>> the area of imaging DSOs. The mistake some have made here is thinking this
>> means SBIG, Starlight Xpress and the rest need to sit up and take notice.
>>
>> I question even the Meade DSI and DSI Pro, since images of DSOs were taken
>> with relatively large telescopes, and at least one image has been called into
>> question whether it was taken with the indicated camera and telescope (I'm
>> referring to the M104 image on Astromart).
>>
>> --- Dave
>


.

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