When I look at juptier at 240x (sirius 10mm + shorty-plus 2x barlow) the bands are clearly visable and seems in focus but the outside edge of the disc is fuzzy...
... Tom, You could be dealing with a number of issues here, collimation _could_ be one but it isn't my first guess. How many nights have you been viewing these...
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skyquest-telescopes: Welcome and Introduction Page Revised October 2003 1. Introduction and Background The skyquest-telescopes forum was founded in...
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Hi all, was just wondering what the other advantages and disadvatages are of larger of smaller focal ratios (as compared to mirror size, or without any...
Anyone with a 35mm Panoptic? According to the televue website, that is the perfect low power eyepiece. Do people here generally agree? I see the exit pupil...
... that is the ... the exit ... focus ... focus, ... this perform ... can use. ... - ... Jason, My preference is for the 27mm Panoptic. It gives slightly...
?? You recommend the 27 panoptic? ... _________________________________________________________________ Express yourself with the new version of MSN...
Tom, Jupiter has always had a soft edge when I have observed it. Being a planet composed mostly of gasses, it does not have a sharp edge or a visible surface....
I originally bought a pair of shower caps at Wal-Mart for 99 cents each. They lasted a couple of months before they started getting rips in them. Then I found...
How do you tell the difference between disturbances in the atmosphere and those caused by heat coming off the primary? I have an XT10i and use the defocused...
... I have used the 35mm Pan in my XT10 on several occasions and I didn't buy one.... Under my sky conditions I determined that my maximum exit pupil that I...
... To be fair, this is probably something that is partially dependent upon sky conditions, too. I have mag 5.5-ish skies, and my 35mm Panoptic is a delight...
One factor that I am not sure has been mentioned relative to warp factors, is the stability of the base of the telescope, or more importantly what it is...
I found that I needed to tweak the balance of my Orion XTi (10 inch) after adding a fan behind the mirror. I have the fan mounted on an 8 inch disc of old...
... I didn't think I did.... I only stated that I didn't like it in my XT10. Maximum exit pupil is a VERY personal choice and can only be determined by...
... Yes!! IMHO its about the best low power wide-field eyepiece for use in these scopes, having regard to its cost. The 26mm T5 Nagler is probably the best...
... I am pretty much the same, I avoid using eyepieces over 30mm Focal Length which is a 6mm exit pupil in my F5 scope, regardless of sky conditions. To me...
A low battery seemed to be ... the $0.99 store. Steve, Actually, I would prefer an internal power jack for a 9V external power source. That way you can star...
Hi all, I did a search but found nothing. What is the simplest way to calculate the exit pupil of an eyepiece? I have a Hardin 6" Dob which is an f/8 scope....
... calculate the exit pupil of an ... that anything larger than ... Divide the focal length of your eyepiece by the f/number (in your case, by 8) of your...
Gene, The way I calculate exit pupil is by dividing the aperture in mm of my telescope by the magnification of the eyepiece. For instance, 254/30=8.47. The...
Had my new xt8i for 2 weeks now, just got back from my second observing session with it. I'm having some trouble with my Intelliscope stuff. I have looked...
... From your description, sounds like only a problem with the azimuth(horizontal) encoder. I am willing to bet that one of the first things Orion will tell...
... length ... Mike, That method works because its really calculating the same thing by back calculating the F-Ratio of the telescope. This requires a lot more...
You cant see the spider vanes with a 35mm panoptic do you? I know if you have to large of a exit pupil, and you look at something bright such as the moon, you...
Thanks John for the algorithms. The examples I used are the ones I use in my Excel 97 eyepiece database. My database is set up so that a user can input the...
If you goto the Televue website, Al Nagler recommends the 35mm Panoptic though. With a 10" dob and a 1200 focal length. I do know its a bit over the 7mm...
I plan to do something similar as I am currently running my fan continuously during observations, and the fan is powered by a 12V battery pack (8 D cells) by...
... Yes, if you back off the eyepiece and observe the exit pupil from a distance you will certainly see a shadow of the secondary mirror. The secondary mirror...
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