Did Questar ever make photographic solar filters?
Posted 09 November 2013 - 07:59 PM
Posted 09 November 2013 - 09:00 PM
What shutter speed are you using?
Posted 10 November 2013 - 10:02 AM
Actually most photographic filters pass more light not less, hence the prohibition against viewing directly through a photographic solar filter.
If you are handy, you might try making your own aperture mask out of Baader Solar film. I have used a Solar film filter for a Televue 85 on my Q50th and find it delivers all the resolution I get from my Questar filter, although the sun's disk appears white instead of yellow. Actually, that is a help for my old eyes as it enhances contrast.
It does seem odd that you can't photograph something that you can comfortably view visually.
Posted 10 November 2013 - 03:21 PM
Posted 10 November 2013 - 05:08 PM
Posted 10 November 2013 - 10:07 PM
Questar makes a Variable Polarizer Filter for the Questar 3.5 or for the Questar 7 Axial Port (PN19276). The filter costs $453.00 (2008 price list). This would be the way to go for photo work. You should call Jim R at Questar and find out what the max % of transparency is. I would guess that you could use it in addtion to the OTA solar filter.
They also have a 30% polarizer filter that screws to the bottom of the Brandon EPs or the Camera Coupling Set that is part of the 10 piece filter set (PN19235)(set price was $276 in 2008).
Posted 22 November 2013 - 12:47 AM