|
Hi Phil,
If your looking for a budget priced eyepiece that has a reasonably wide AFOV these will do a "fair" job in your F10 SCT. If you can't afford premium eyepieces you have 2 options.
1. Go with a lesser quality eyepiece that has a reasonably wide AFOV and poorer quality images (eg GSO Superview) or
2. Go with a top quality eyepiece with a narrow FOV (eg UO HD orthos or Ultrascopics etc)
On the basis that your scope being an F10 CAT has an inherrently narrow FOV you may wish to go for the 1st option. If you don't mind a narrow FOV but want excellent image quality the 2nd option is by far the better.
I tested the GSO 15mm and 20mm Superviews at SPSP in my own F5 scope and wasn't that impressed with them. While the edge performance would be improved a lot in a slower scope like your F10 Cat the on axis performance was only reasonable compared to both my UO HD orthos and my pentax's. Certainly a "good" orthoscopic or plossl albiet having a narrow FOV will walk all over the 1.25" GSO's in terms of sharpness, contrast and light transmission. Its worth noting that the 2" GSO Superview's perform a lot better relatively speaking than their 1.25" little brothers IMO. I own the 2" 30mm GSO Superview and it does a very good job even at F5 for a budget eyepiece.
Having said all of the above and probably given you the impression I don't like it much, if you want something that is reasonably cheap, has an AFOV over 55 degrees and has fair eye relief they are probably still the best option for you. I just didn't want you walking in and buying them with a misconception that they perform at 90% of the level of a premium eyepiece for 10% of the price because they aren't close to that. They do a good job at a budget price which may be what your looking for. Personally I would think about an 18mm UO HD ortho for about $120, narrower FOV, infinitely better images right across a tack sharp FOV in your F10 CAT
CS-John Bambury
|