... Yes, there does seem to be a disturbing pattern of over-statement of eye relief in many eyepieces. The British Magazine "Sky at Night"( November 2005) has...
Somehow I am not surprised at this eye relief discrepancy. After all we have refractors being sold with focusers that vignette the aperture to less than...
You are correct Darren. Sue's comment was that she could see more filamentary detail in the 115. IMHO I think it relates to the finer optics and better...
Hi Darren, Feeling really bad about you not getting any clears skies up there. Well, it's the holiday season and all, so I thought I would give you one of my ...
Harry, that must be a missprint. The chrome barrel on my Meade SWA 28mm eyepiece is just a hair under 50mm o.d. For a 49mm field stop, the chrome barrel would...
Hmm, then it seems like a 40-42mm widefield eyepiece is false advertising in a way. From the formulas I can't see any reasonable focal length where the field ...
... Jeff, thanks for the post. I have stated that resolution on dim dso's is "not as important" and I need to clarify my position on that further. When most...
... Harry, this is why, in 1-1/4" format, I tell people to get the 32mm plossl, but not the 40mm plossl. They both have the exact same field stop diameter...
Good point Darren! Today's CCD and CMOS chips are enhanced to daylight spectrum (viewing), whereby the predominant color bayer matrix (pixel) is green or...
Gee David, Gosh nice of you to help our SVer's who are sky challenged! (I am in the same boat now, as the Midwest is cloudy.) Your reports are impressive. ...
Well, the field stop cutoff is not total so you can get some field illumination beyond it so a 40mm eyepiece does give you a bit more than a 35mm but not much...
An editor of Popular Photography and Imaging found this problem with digital cameras about a year ago. When you get camera chips with ever increasing file...
Well, the "problem" must have been with Mars that night then. Last night (Nov 30th) I was able to get such good detail at 200x I decided not to use a filter!...
Bob: What you posted is a pretty good assessment but I always jump in here to address the quality concerns I have based on comparitive testing. The fact that...
Yes I think you guys make a good point. But GLB (by the way what is your name as I feel funny addressing you by initials) I still would like to know what is...
David - Thanks for the clarification and I agree 100%. Jeff ... Jeff, thanks for the post. I have stated that resolution on dim dso's is "not as important" and...
David E & Harry; Claimed field stop size can be larger than the barrel interior but there has to be edge vignetting, noticed visually or not. Both the Orion...
OK, it looks like I've learned about handling the green filter now: http://www.flickr.com/photos/79653922@N00/69040022/ Plus, the longer exposure overall shows...
Vic, Nice clarification of the achro/apo issues. In following the thread on Apo vs Achro I got the impression that people maybe really were saying that apos...
Jeff, This looks very nice! An excellent improvement! Great work! The cloud and filaments make a great contrast! I suspect there might be a bit more in the...
Jeff, Beautiful image! The color on the filaments looks real nice. Great contrast with the cloud. Thanks for sharing. That SV 152 looks like a great AP...
... Thanks, Matt! The frost came much later, after I'd moved way over to M51 to try it. About midway through the first of that sequence I noticed noise in the...
What is an XC filter. If it eliminates the problem, I'd like one. On a different topic, I saw an image taken with a digital rebel through a WO 80mm Semi APO,...
JB, Excellent image! The iterations of L to RGB ratios seem to have worked out well. I have seen other ratios as L=1.5 R=2.0 B=1.8 G=1.8 and then compensating...
Okay. All this discussion about the difference between 3 and 4 inch views. (see above) I'm drawn to the 102BV scope. I like the idea of a 4" doublet because my...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
