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PF65EDA vs PF65EDAII (1 Viewer)
- Thread starter ve2vk
- Start date
Pentax did improve the PF65AII but only in respect of CA performance of this scope. Unfortunately this doesn´t have any influence on other optical aberrations which are probably responsible for lack of sharpness.
Steve
Alexis Powell
Natural history enthusiast
If your scope doesn't come into sharp focus above 30x it is defective. The Pentax 65 (either model) should support much higher powers.
--AP
RAH
Well-known member
As Alexis says, the 65 should give very sharp views above 30x. You don't mention what eyepiece you are using. I use the Vixen 8mm - 24mm Lanthanum ( http://www.adorama.com/VXLAZ.html ), and get sharp focus just about up to the top magnification with my PF65EDA.
PF65EDA sharpness above 30X
The eye pieces I use are the SMC Zoom EP and the fixed EP XW10. I also have the XW20 and XW14, the view is stunning with the latter two EP's and also with the SMC EP up to 30X. I had the chance to compare my current scope in the outdoors and I got pretty much the same results.. I'm wondering if it's my eyesight or it has to do with the scopes !
Regards from Bruno.
The eye pieces I use are the SMC Zoom EP and the fixed EP XW10. I also have the XW20 and XW14, the view is stunning with the latter two EP's and also with the SMC EP up to 30X. I had the chance to compare my current scope in the outdoors and I got pretty much the same results.. I'm wondering if it's my eyesight or it has to do with the scopes !
Regards from Bruno.
Alexis Powell
Natural history enthusiast
Just to state the obvious, high power requires using a sturdy tripod, the view will not be as bright at high powers, and if you are looking at distant objects the higher powers will allow you to see atmospheric ("wiggly air") effects that degrade the view, but otherwise there is no reason why your scope should not come into sharp focus with those eyepieces unless it is defective. If your eyes work when looking through the scope at low power, they should work just as well at high power, but you do need to center your eye more carefully and depth of field is shallower so precise focus of the scope is more critical.
--AP
RAH
Well-known member
Zoom eyepieces often get worse results (not as sharp, darker) near their highest magnification (i.e. near the top of their range), but it doesn't seem as though it should be happening so early (30x). And, as I say, my Vixen goes right to the top with good clarity. I think your zoom eyepiece - not the scope - may be defective. Can you borrow another zoom eyepiece from someone just to try it out?
Alexis Powell
Natural history enthusiast
