Quote:
Originally Posted by MortonH
The other day I read about some new Masuyama 2" eyepieces, including a 32mm 85º model that's had some favourable initial reviews.
http://agenaastro.com/masuyama-2-inc...mm-mop-32.html
MOP-32 Masuyama 2" Eyepiece 32mm 85º - $490AUD (same cost as importing from Agena) |
Hi Morton,
This isn't a cheap eyepiece and I have some reservations about an eyepiece designers ability to design a 32mm 85 degree eyepiece with only 5 elements, offering a flat field view with good edge of field performance in medium to fast F ratio telescopes. Historically some pretty smart eyepiece designers including Carl Zeiss, Ernst Abbe, Heinrich Erfle and Al Nagler haven't been able to achieve this over the past 160 years. My guess is that these will be similar to the Widescans of a couple of decades ago which worked very well in medium to slow telescopes, particulalry slow refractors, but fell over in today's faster telescopes. I may be wrong, but I would want to try it out first at sub F6 F-ratios before I shelled my cash out.
Outside their EOF performance in fast telescopes, optically they should be very good, as were the Widescans.
The other focal lengths could work very well because they have a much narrower AFOV.
Cheers,
John B