Vixen 50mm LV
Posted 27 September 2003 - 07:12 AM
But it is a very good value and the 2.5° field of view with a 4" f/8.8 apo is very nice.
On the other hand the 30mm version has a 2° field but a much darker sky background.
Anyway I like these eyepieces. Opitcally they are great but some adjustments would make them more practical to use. Recommended!
Posted 29 September 2003 - 10:08 PM
Posted 30 September 2003 - 07:12 AM
The 30mm Widescan Type III is twice as expensive as the LV50 in Japan. The Widescan would have a slightly larger true field of view, but a much smaller exit pupil. I would think it is difficult to compare a 30mm eyepiece to 50mm eyepiece. What do you mean by "better."
Posted 30 September 2003 - 11:01 AM
to me, we usually want more field, instead of lower power or large exit pupil, unless aperture is limited.
Posted 01 October 2003 - 03:10 AM
I do find a significant difference in image brightness between a 30mm and 50mm eyepiece. And I hate to disagree with you, but contrast decreases as maginification increases.
But really, the difference between a 30mm and 50mm eyepiece makes comparision very difficult. The difference in magnification, image brightness, and price alone negates any judgements. I think a comparision between the Pentax 40mm XL would be better. But, like the Widescan, it is twice as expensive.