[Aavso-photometry] Re: [AAVSO-DIS] SBIG's New Low-Cost Photometric CCD Camera

[Vello Tabur]

arne wrote:
> Petriew, Vance wrote:
>>  
>> Well to pleasant surprise, SBIG is now offering an internal filter 
>> wheel with BVIC filters (as recommended by Arne).  
>>  
>> http://www.sbig.com/sbwhtmls/402bvi.htm
>>  
> Yes; Alan Holmes and I discussed this in several emails, as well as in
> person at the SAS meeting last May.  I think their special ST402
> interference BVI filters will work fine. 

I was just about to purchase a set of BVR filters and see that you 
recommend I instead or R. I'm wondering what the rationale is for this? 
Is it because the V-I allows a more accurate color-temperature 
determination than V-R? The advantage of R is greater S/N (due to higher 
QE). Just curious about the trade-offs...