Harry Siebert Optics UltraPlus 17.5mm, 2 inch

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Brand and Model:Harry Siebert Optics UltraPlus 17.5mm, 2 inch
Price ($USD):$189.00
Type:Misc Wide Angle
Focal Length:17.5 mm
Barrel Size:2
Apparent FOV:65.0 degrees
Field Stop Dia.:0.0 mm
Eye Relief:15 mm
Weight (lbs):

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Harry Siebert Optics UltraPlus 17.5mm, 2 inch
Used in an F/10 8" SCT, 10" Dob. Also binoviewing. I spent an evening swap comparing this in the SCT with a Pentax 14XL and a Nagler 17 on the Ring and a globular cluster. The Siebert UltraPlus had dark, flat, crisp views. Fainter stars were visible on a darker background than the Pentax, and the eyepiece was only slightly edged out by the Nagler's bigger FOV and a slightly smoother, velvety image. Quite credible views with good color/contrast... given the small size/weight and price of the Siebert.

These are 1.25" eyepieces in a 2" housing for ease of use. Fit and finish might be a 7 or 8.

In the bino the light weight is a boon... and the images were even MORE velvety and black, black, black!... with crisp, stark images of very faint objects. Great contrast!

A very good value in my opinion.

Overall Rating: 10
Optics:10 Value:10
Weight: 6 (Veritable Vote)
By: kkirksea
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=193806

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