Harry Siebert Optics Ultra 13mm, 1.25 inch


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Brand and Model:Harry Siebert Optics Ultra 13mm, 1.25 inch
Price ($USD):$149.00
Type:Misc Wide Angle
Focal Length:13 mm
Barrel Size:1.25 in
Apparent FOV:70.0 degrees
Field Stop Dia.:0.0 mm
Eye Relief:20 mm
Elements:6
Weight (lbs):0.0
Description:

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Harry Siebert Optics Ultra 13mm, 1.25 inch
I use this EPp in an Orion XT10 and Starmax 127. It gives beautiful views and for the price is an outstanding value. I gave it nines because tens are perfect and perfect doesn't exist. Have no problem fitting in either focuser and in my Ultima Barlow (which some say is tight on some eyepieces). Am disappointed that more users don't post comments about the wonderful EP's that Harry Siebert makes.

Overall Rating: 9
Optics:9 Value:9
Weight: 3 (Unreliable Vote)
Date:
By: Anonymous (xxx.xxx.251.1)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=105488


Harry Siebert Optics Ultra 13mm, 1.25 inch
I've been using this eyepiece in my 12" f/10 LX200 GPS SCT to observe the planet Mars. The over all build quality is very high. The optics used in this eyepiece are of high quality with very good fully multi-coatings. The on axis sharpness is as good as my 19mm Panoptic. I see no edge distortion at all in my f/10 SCT. I've not used it my 10" f/4.5 Dob, so I can not state how good the edge is in a fast scope. The 70* afov seems true when doing a drift test.

Overall Rating: 9
Optics:10 Value:9
Weight: 1 (Unreliable Vote)
Date:
By: Anonymous (xxx.xxx.169.43)
Link to this vote: http://excelsis.com/1.0/displayvote.php?voteid=261600

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