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...
30238
Gene Horr
genehorr
Jul 1, 2005 7:34 am
It is the second one made in the year 2000 ("00"). Gene Horr...
30239
Art Ciampi (Texas Nau...
art1942us
Jul 1, 2005 2:00 pm
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...
30240
Skyloverz@...
skyloverz2002
Jul 1, 2005 2:02 pm
What news Art? [Non-text portions of this message have been removed]...
30241
Art Ciampi (Texas Nau...
art1942us
Jul 1, 2005 2:06 pm
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 ... ...
30242
Art Ciampi (Texas Nau...
art1942us
Jul 1, 2005 2:28 pm
I will ask for you. Art ... From: Skyloverz@... To: UncensoredTakGroup@yahoogroups.com Sent: Friday, July 01, 2005 9:01 AM Subject: Re:...
30243
hw_ngr
Jul 1, 2005 10:11 pm
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...
30244
Gene Horr
genehorr
Jul 1, 2005 10:31 pm
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...
30245
hw_ngr
Jul 2, 2005 2:55 am
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"...
30246
wmrroy
Jul 2, 2005 3:07 am
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...
30247
Gene Horr
genehorr
Jul 2, 2005 3:31 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...
30248
Steve Beckwith
spbeckwith2003
Jul 2, 2005 3:55 am
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...
30249
derek_ec
Jul 2, 2005 4:17 am
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...
30250
Mike J. Shade
mjlshade
Jul 2, 2005 4:53 am
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...
30251
Herb York
herbyork
Jul 2, 2005 4:59 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...
30252
Ray York
cedarking
Jul 2, 2005 5:10 am
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...
30253
wmrroy
Jul 2, 2005 5:21 am
... 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...
30254
Ray York
cedarking
Jul 2, 2005 5:24 am
Thank you Randy. :^) wmrroy <wmrroy@...> wrote:--- In UncensoredTakGroup@yahoogroups.com, Ray York <rayyork@y...> ... Assuming we do, I will fax you a...
30255
ninae1zd
Jul 2, 2005 6:06 pm
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...
30256
vahe352
Jul 2, 2005 10:38 pm
... wavefront ... front ... In compound optical systems errors are not always cumulative, sometimes they are and sometimes they are not. In high end compound ...
30257
jhapeman1
Jul 3, 2005 4:35 am
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...
30258
adam81224
Jul 3, 2005 5:53 am
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...
30259
astrotrf2002
Jul 3, 2005 6:25 am
... 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. ... ...
30260
hw_ngr
Jul 3, 2005 11:21 am
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...
30261
Gene Horr
genehorr
Jul 3, 2005 11:57 am
Whoops! Sorry about that. I thought that it had the same thread as the three set screw adapter. What part was missing? Gene Horr...
30262
derek_ec
Jul 3, 2005 3:32 pm
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...
30263
Bryan Tiffany
b_l_tiffany
Jul 3, 2005 3:45 pm
Heinz, I would take exception to Vahe's comment about testing the Mewlon- 300 interferometrically. Interferometry is the perfect tool for doing system wave...
30264
Neil Fleming
neilfleming
Jul 3, 2005 4:51 pm
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...
30265
Mike J. Shade
mjlshade
Jul 3, 2005 5:36 pm
... 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...
30266
Gene Horr
genehorr
Jul 3, 2005 6:27 pm
... 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...
