My secondary offset is about 1/10 of an inch, maybe a little less. The formula calls for 1/10 inch so I quess that is OK.
I just wish I could get the shaddow of the secondary to be in the center with the holographic collimator. Just can't seem to get it to collimate and still stay in the center. It collimates fine but the shaddow is always off-center. Not just the offset, but usually a little low as well. I guess I just can't worry about it. I am not sure if I should move the secondary by adjusting the spider bolts to see if I could get it to the center, or just leave it alone.
Any input as to the fix for this problem?
All the articles that I can find on the internet are not that informative about this.
Also, I keep reading that I should see the secondary as a perfect circle when looking through the focuser with a film canister with a hole drilled in the top. I see a perfect circle of the reflection of the primary that is lined up pretty much with one edge of the secondary, but I still see the secondary as a slightly oval shape. The circle of the primary has a crescent of the secondary to the left of it, not too large but still it has one. Is this a problem?
I did not built this scope only just bought it not too long ago and am trying to check out all the optics and get the best collimation possible.
Thanks all.
Floyd
I just wish I could get the shaddow of the secondary to be in the center with the holographic collimator. Just can't seem to get it to collimate and still stay in the center. It collimates fine but the shaddow is always off-center. Not just the offset, but usually a little low as well. I guess I just can't worry about it. I am not sure if I should move the secondary by adjusting the spider bolts to see if I could get it to the center, or just leave it alone.
Any input as to the fix for this problem?
All the articles that I can find on the internet are not that informative about this.
Also, I keep reading that I should see the secondary as a perfect circle when looking through the focuser with a film canister with a hole drilled in the top. I see a perfect circle of the reflection of the primary that is lined up pretty much with one edge of the secondary, but I still see the secondary as a slightly oval shape. The circle of the primary has a crescent of the secondary to the left of it, not too large but still it has one. Is this a problem?
I did not built this scope only just bought it not too long ago and am trying to check out all the optics and get the best collimation possible.
Thanks all.
Floyd
[SIZE="Large"][/SIZE][COLOR="Blue"][/COLOR] Floyd Blue
Amateur Imager