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Old 07-06-2020, 06:32 PM
BruceF13 (Bruce)
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BruceF13 is offline
 
Join Date: Jun 2020
Location: Kew East
Posts: 6
Quote:
Originally Posted by gaseous View Post
Welcome Bruce,


The Baader8-24 zoom is a well respected zoom eyepiece. The field of view at the 24mm setting is a little on the narrow side, but the overall usability and quality is top shelf. At 24mm you're probably better off going for a normal widefield eyepiece. If your scope is F10, I can't see the barlow being a requirement - you'll have 85x - 254x without it. A very general rule for maximum magnification is 2x the aperture of your scope in mm, so in your case, 2 x 200 = 400x. In reality, you'll rarely be hitting 400x without some serious deterioration of the viewing, so money on the barlow might better be spent on an eyepiece in the 5-6mm range if you think you'll want extra magnification, or something for widefield in the 24-30mm range. Depends on what you plan to be watching I guess.

Thanks for that. Rookie question, but why does the viewing deteriorate at higher magnification?

Is it more affected by atmospheric and viewing conditions, or just that it's harder to focus?

Cheers.
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