Quote:
Originally Posted by DavidTrap
Thanks for the reply Mark,
What scope are you using these on? Also, what sort of camera are you using?
I thought the small frame DSLR sensor might just be "fully illuminated", however, the reduction may be greater than .67x as the distance to the sensor might be greater, causing a smaller illuminated circle.
DT
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David I use these on a LX200R (same as the ACF). The KAF 8300 can be found in CCD camera,s from QHY, SBIG, Finger lakes, Orion, Atik, Starlight Xpress etc. I am using a QHY9 and the optec unit caused strong vignetting on the corners so was not good for this size chip. Best way to find out if it will work for your camera is to grab a compass and draw the fully illuminated field then try to fit the dimensions of your chip inside the circle. The AP needs to be 101mm from the chip to give 0.67 reduction and thus the 30mm imaging circle (actually 29 and a bit but close enough). The optec will not be suitable for the DSLR if your dimensions are correct....Email from optec;
"Thank you for your message. The ccd used in the QHY 9 camera has a 24mm diagonal. The NGUW 0.7x reducer will not cover this chip size, providing about an 18mm unvignetted image size. Unfortunately, I don’t think you would be satisfied with the resulting image".
Mark