Hi all, I don't think I've posted here before but have been a member and visited from time to time. I just acquired an older Sky 90 - I think it was from an...
Please use the numbers in our catalogue or at our website . On rare occasion we may use the Takahashi longer number, but this is used for new parts. Our...
All slow motion controls for all EM-10's are electric. The previous EM-100 mount had manual slow motions, but that was almost 15 years ago. Art Ciampi ... ...
Does anybody know the wavefront error of the primary of the Mewlon 300? Are there any data available somewhere? Or is this a trade secret? Thank you and clear...
It isn't published. But the image quality is as good/better than systems which test at 1/4 wave wavefront error which implies 1/16 wave surface error or...
Gen , thank you for the reply. So, the Mewlon300 would for example be a better performer than a system with a 1/12 wave primary? When you talk about "system"...
I don't usually cross post, but I posted this to the other Tak group and since I've received a lot of help on this site, wanted to post here as well. I am...
The wavefront error increases as 2/cos(light angle from the plane of the mirror). To simply things substantially we'll treat the mirrors as flat planes and so...
Heinz, Assume the primary and secondary both each have a surface error of 1/16th of a wavelength. The wavefront will have a 1/8th wave error after reflecting...
Ah, I see.....Many Thanks. I have a short version and with this, a long version. Guess I'll do a side by side but probably keep my short version, sell this...
Ditto on the Mewlon, I'm using it for CCDwork at its native f/11.6 or so with an ST10XE and other than a touch of coma at the edges, works very well and am...
Mike Shade and happy in the same sentence? I am keeping this one <g> Herb On Jul 1, 2005, at 9:53 PM, Mike J. Shade wrote: Ditto on the Mewlon, I'm using it...
Hi Randy, I am in tomorrow and I think that we have some of these in stock. Assuming we do, I will fax you a copy of the instructions if you like. If you have...
... Assuming we do, I will fax you a copy of the instructions if you like. If you have a fax # you would like it sent to, please email the # to my main account...
Thank you Randy. :^) wmrroy <wmrroy@...> wrote:--- In UncensoredTakGroup@yahoogroups.com, Ray York <rayyork@y...> ... Assuming we do, I will fax you a...
Hey I just wanted to tell you about a great company I found! I applyed for a lower mortgage rate and i only had to fill in a simple form. This month alone I...
... wavefront ... front ... In compound optical systems errors are not always cumulative, sometimes they are and sometimes they are not. In high end compound ...
Anyone have access to non-Japanese instructions on how to polar align this little guy with the optional polar scope? I thought I had it last night, but I...
One week later, had to order an adaptor from TNR-all's well after an additional $100.00 bucks. Works great, recommended to anyone with a binoviewer- lots...
... occasion we may use the Takahashi longer number, but this is used for new parts. Our catalogue will have the longer stock number for these few parts. ... ...
Thank you Gene and all the others for your elaborate answers. I am really impressed by your helpfulness. My picture is clearer now, but it seems to be a...
Hello all, happy 4th July weekend. I just had to share my elation at first light on my Sky 90('s) last night. This may all be a pase discussion here as I...
Heinz, I would take exception to Vahe's comment about testing the Mewlon- 300 interferometrically. Interferometry is the perfect tool for doing system wave...
I just got a new notebook computer. It doesn't have a serial port, so I got a USB-Serial converter cable. Everything seemed OK when I tested it before going...
... Interesting idea regarding the coma and mirror spacing...I have had experience with Ritchey's and they are very fickle in regards to mirror spacing and...
... For long exposure or relatively low power views you are completely correct. But for high power planetary viewing or imaging when you are waiting for those...
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