Quote:
Originally Posted by norm
Hello All,
Are there any negative aspects of using a visual paracorr (eg, Televue type).
Is the wieght an issue and does it diminish the views in any way?
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Hi Norm,
It depends on the scope you are using it in and what eyepieces you plan to use it with. Your sig panel doesn't indicate what scope you plan to use it in, nor your eyepiece set. Care to enlighten me ?
The paracorr in itself isn't that heavy but combined with a big heavy eyepiece, it will cause major balance problems, in a small or medium sized dob. I have a paracorr and only use it in the 18"/F4.5 and only with a couple of my eyepieces. Namely, the 31mm nagler, the 17mm nagler and the 14mm and 20mm pentax XW's. I don't use it with any of my other eyepieces, which are many. The other eyepieces just don't gain enough with it as the FOV is narrower and the visible coma a lot less. In addition, I don't use it with my 10"/F5 dob. There isn't much to gain with it at F5 and it causes balance problems. I use a 27mm panoptic as my low power eyepiece in this scope as opposed to the 31mm nagler in the 18"
My advice would be unless you have a scope over 12" aperture and faster than F5 and own several premium eyepieces that will benefit from the paracorr, save your money. It's better spent on a few good quality eyepieces to better suit your scope.
Quote:
Originally Posted by norm
Would you notice anything significant if you used one and then took it off (other than the coma).
I'm thnking any extra glass between the focuser/eyepiece will have some impairment?
Any feedback welcomed! 
Cheers Norm |
With the right scope/eyepiece combination it gives an aesthetically nicer view, particularly towards the EOF. Again depending on your scope/eyepiece combo it will show "MORE" stars across the field because brightness of the airy disk is proportional to the spot size which is affected by comatic blur. In other cases you may not see a lot of difference.
To be more helpfull I really need to know what you own and what you might be likely to buy in the future.
Cheers,
John B