[Aavso-photometry] 2 arc-sec/pix

[Wolfgang Renz]

Hi Arne

Obviously others have different applications and rules too:

Anacortes - CCD RESOLUTION (Pixel Size and Focal Length)
http://www.buytelescopes.com/container.asp?dest=/promo/Resolution.htm
http://www.buytelescopes.com/promo/Resolution.htm
http://www.buytelescopes.com/promo/images/pixel_fov.gif

Clear skies
 Wolfgang

-- 
Wolfgang Renz, Karlsruhe, Germany
Rz.BAV = WRe.vsnet = RWG.AAVSO



----- Original Message ----- 
From: "arne" <arne at aavso.org>
To: "AAVSO photometry" <aavso-photometry at aavso.org>
Sent: Tuesday, June 12, 2007 6:25 PM
Subject: Re: [Aavso-photometry] 2 arc-sec/pix


> mlfleenor at charter.net wrote:
>> I apologize to Apogee for insinuating that they were advocating 2"/pix
>> sampling. Upon closer reading ( you should be careful answering email
>> during lunch ) they indicate halving the seeing to avoid undersampling. 
>> 
>> S&T however still has a reference see
>> <http://www.skyandtelescope.com/howto/astrophotography/3304356.html?c=y&showAll=y>
> 
> I love the delays on this maillist.
> I'll talk to Dennis - this is a general article, and does say
> 
> "For example, conventional wisdom suggests that the astronomical seeing
> conditions experienced by a typical backyard observer will produce excellent
> deep-sky images with pixels that cover about 2 arcseconds (2") of sky."
> 
> which is a generic statement that does not get into the issue of
> proper sampling.  He is also talking about *imaging* rather
> than *photometry*, and for that, he is correct.  However, putting
> such a statement in an article will make newcomers think that such
> sampling is adequate for all observing.
> Arne