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Old 07-04-2006, 03:45 PM
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Dave47tuc (David)
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Join Date: Dec 2004
Location: Mornington peninsula. Victoria.
Posts: 1,658
Quote:
Originally Posted by janoskiss

Dave, I would guess that the example you give would indicate that there is no significant field curvature in the EP, if indeed you get an edge-to-edge practically perfect view in a scope with a perfectly flat field, like a premium apo. But we will have to wait and see what the actual results are when you do test out that EP in the AP apo.
I have not had a chance to do any night tests. In the daylight the Pentax was very sharp and clear. I saw no field curvature.
I have done a night test with a 12 nagler and 22 panoptic in my old dob and a 5"Tak.
I short the eyepieces where perfect in the Apo but did show coma in the F5 Dob.
The last 3rd Of the field in the Pano did seagull a bit but the stars where pinpoint in the apo across all the field.
I have no doubt that in my MK-67 all the eyepieces i have will be super sharp and keep me happy, thats what counts I suppose.
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