[Aavso-photometry] New Member - Scope Questions

[Roger Pickard]

Hi Mick,
I note your queries have already been addressed, but what's wrong with the 
BAA VSS?
We already have a very active CCD photometry programme (and co-operate 
very closely with the AAVSO on many issues).
And in further answer to your query about using a refractor have you not 
seen any of the outstanding work both Jeremy Shears and Richard Miles have 
done from the UK using refractors?
Cheers,
Roger
-----
Roger Pickard,
Director, BAA Variable Star Section,
BAA VSS Web Page: www.britastro.org/vss


On Wed, 9 Nov 2005, Michael Crook wrote:

> Hi everyone,
> 
> I am based in the UK and have just joined the AAVSO -
> this is my first post to this list and I hope that
> soon I will be able to produce some useful data. Being
> new to photometry I have a few questions of course -
> any help would greatly appreciated!
> 
> I have a FLI Maxcam ME2 NABG camera + filter wheel and
> 'v' band filter. I am finding it hard deciding what
> 'scope to use it with. I intend to get a GOTO mount,
> but I have 2 main concerns regarding the OTA-
> 
> 1) I have a 5" F6 Achromat refractor - Would this be
> acceptable to use for CCD photometry - ie would the V
> filter cancel out the false colour problem?
> 
> 2) Reflectors - When using an aperture photometry
> package (such as IRIS) how do you get around the
> diffraction spikes in the image caused by the spider
> vanes? Won't they encroach on the 'sky' annulus and
> cause false readings?
> 
> Regards,
> Mick
>     
> 
> 
> 
> 
> 
> 		
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