... To the best of my knowledge the 155 is an EDT, the model prior to that was 152mm f/9 Starfire non ED, the transition took place about 1991. The 152's are...
One that I've seen is a 120 ED Astro-Physics (f/8.5), delivered Oct/Nov 1991. How well do you think this compares with current-day telescopes? What's it...
Clear Day I have a 4" extension tube. Two thumb screws with brass locking ring, Slip with threaded interior on the scope side. Not even sure if this was...
Hmm....well I left the house too early this morning to read this. It ended up being a 152mm f/9 Starfire like you mention below but I got it anyway. I'm...
... Yes! This must be seen how much such a scope can show on planets. Last Mars apparition I saw in a quite similar scope mottling around Syrtis Major and...
In a message dated 8/1/2004 7:09:38 PM Central Daylight Time, ... The prisms are permanently collimated, so no adjustment is possible, or even desireable...
Thanks Mark....I do think it's in excellent condition. I probably shouldn't worry about the value since I'll probably never sell it anyway. :) I'd feel...
Actually, the current building is 11,000 square feet. We are adding another 10,800. We are sitting on a 3+ acre so the building looks pretty small. Clear...
That's cool. Now you can see the restaurant on the right and the bright gas station across the street to the left (our current building blocks that light from...
Gil, You will DEFINATELY need a new mount. Even the Losmandy G11 struggles with the length of a 6" f/9 APO, and it is supposed to be steadier than the...
I hope the field across the street remains undeveloped for a while longer. We have seen the encroachment of development over the last few years, as many of you...
I would like help in setting up the optimum imaging train for using the 155EDF 4" focuser & field flattner with the SBIG CFW8A and ST10XME. I would prefer a...
Roland, Thanks for the personal reply. I thought at one time there as a diagram that also showed this process. I have used the AP/Baaders for about 2 years...
... wrote: I am ... Paul, Go to the AP web site/Technical Support/Vintage Products/Telescope Accessories/Collimating the Giant Zeiss-Baader Planetarium...
In a message dated 8/2/2004 4:17:50 PM Central Daylight Time, ... Certainly. You will need a 2" nosepiece for that configuration, and you will need an...
Hi group, I notice that there are several AP scopes for sale on Astromart right now(Stowaway on Auction, AP152 Classified, AP 130 EDF on Auction). Vivek...
Has anyone else seen this? New product showcase in Sept. S&T magazine has profiled a new Vernonscope 2" 1/20th wave (or better) VERNONscope Quartz Star...
In a message dated 8/2/2004 9:21:37 PM Central Daylight Time, ... Did you see my answer in Astromart? Roland Christen [Non-text portions of this message have...
Hello Paul, I asked about this earlier this month. I still can't understand why a 1/20th wave SILVER diagonal would be better than a 1/10th wave Dielectric ...
Roland was kind enough to post this response to my question when posed on Astromart tonight so I am cutting and pasting it here - This seems to come up again...
In a message dated 8/2/2004 9:21:37 PM Central Daylight Time, ... It might be an impossible task to get real understanding of geometrical optics into the...
... of ... I ... Let's see: (1) The difference in surface accuracy couldn't be detected by the most highly skilled observers under any conditions and as you...
yeah, but chuck you're missing the point...1/20th wave is more perfect than 1/10th wave. Whether such perfection can be "utilized" or not does not assail the...
I've never heard any authoritative comments about gold diagaonals which I have heard about, kid of like ancient rumors about El Dorado, but never seen in...
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