Celestron SMA 25mm

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Brand and Model:Celestron SMA 25mm
Price ($USD):$32.95
Focal Length:25 mm
Barrel Size:1.25 in.
Apparent FOV:52.0 degrees
Field Stop Dia.:0.0 mm
Eye Relief:12 mm
Weight (lbs):0.25
Description:The SMA design is an improved version of the Kellner eyepiece. SMAs are very good, economical, general purpose eyepieces that deliver a wide apparent field, good color correction and an excellent image at the center of the field of view. The eyepieces are fully coated for maximum contrast. Celestron offers a range of SMA eyepieces in 1-1/4" sizes.

Celestron Eyepieces Page

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Celestron SMA 25mm
I used this eyepiece with a 4.5" f/8 Meade reflector. It was far superior to the .965" eps that came with the scope, and in fact was as good as any less expensive Plossl that I tried. It gave me excellent views of the moon and wider clusters with this scope. It is a good choice for anyone on a tight budget who needs to improve over the cheap eps that come with less expensive scopes.

Overall Rating: 8
Optics:8 Value:8
Weight: 5 (Veritable Vote)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=563342

Celestron SMA 25mm
For its type it is tops! Uses the full width of the barrel so gives the widest true field for a 1.25 inch size.

Works very well with 5 inch SCT of f/10 Nice pinpoint star images, bright views, great contrast.

Eye relief is not quite enough so I must remove my glasses to see the full apparent field of view. There is no eyeguard so stray light can interfere with observing.

Has a large enough lens and relief to be used for afocal photography with a camera bracket. However I use a Digi-T adapter with a 25mm Plossl instead rather than try to align it to the camera - eyepiece bracket.

Overall Rating: 9
Optics:10 Value:10
Weight: 5 (Veritable Vote)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=540668

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