Thought I will just drop a line here to inform members about this little-known brand of 'home-made' eyepieces... I own one of these budget line of eps, and have looked through a couple others before. IMHO, they offer a good mix of price, performance, field-of-view (usually 70deg), and eye-relief. For short focal length eps, I definitely prefer these over plossols, which have very limited eye-relief and have tiny pin-hole lens.
I have a 19mm which offers 70deg fov and 20mm eye relief. Sharp and contrasty but perhaps a notch below the Pentax 21mm XL. But its much smaller, lighter, and cheaper than the Pentax too.
Check them out at www.siebertoptics.com
Usual disclaimer, I am not connected to them in any way...
Siebert Optics Eyepieces
I have the 2" 13mm Ultra Series. FOV is about 70 degrees. I find that the light throughput is pretty good, just that cosmetically it doesn't look very attractive. But it does have a chrome barrel...far better than his earlier lines that looked really home-made.acc wrote:Thought I will just drop a line here to inform members about this little-known brand of 'home-made' eyepieces... I own one of these budget line of eps, and have looked through a couple others before. IMHO, they offer a good mix of price, performance, field-of-view (usually 70deg), and eye-relief. For short focal length eps, I definitely prefer these over plossols, which have very limited eye-relief and have tiny pin-hole lens.
I have a 19mm which offers 70deg fov and 20mm eye relief. Sharp and contrasty but perhaps a notch below the Pentax 21mm XL. But its much smaller, lighter, and cheaper than the Pentax too.
Check them out at www.siebertoptics.com
Usual disclaimer, I am not connected to them in any way...
Pretty sharp to about the last 10 degrees or so. Overall, very good for the money! No wonder you don't see these Ultra Series coming out in astromart very much.