William-Optics at Yahoo! Groups

Re: Reaching focus on a Megrez--last question

Mark Acker — Sat, 21 Nov 2009 06:31:48 GMT

That ambiguity was what actually led to the question. ;) I am going to see if I can get a FLAT3 as that one does seem to have a higher probability of

Re: Reaching focus on a Megrez--last question

Perry Holcomb — Sat, 21 Nov 2009 03:10:39 GMT

Hey Mark, No, you can't be certain it'll work. WO does not recommend the FLAT2 for the M80. It recommends the FLAT3. See:

Re: Reaching focus on a Megrez--last question

Mark Acker — Fri, 20 Nov 2009 18:56:54 GMT

So, before I place an order for one, can I be reasonably certain that the FLAT2 will work on an 80mm Megrez II? These things seem to be ridiculously hard to

Re: Reaching focus on a Megrez

Mark Acker — Wed, 18 Nov 2009 21:02:05 GMT

Thank you Lynn. I will start looking for a reducer and see how it goes. Sounds like it is a much better option all the way around since it does more than

Re: Field size of sky imaged

Delyan Toshev — Wed, 18 Nov 2009 16:47:17 GMT

Hello, I propose to you or others interested to view this FOV visualisation http://www.12dstring.me.uk/fov.php , that I use over a year now and find one of the

Re: Reaching focus on a Megrez

Perry Holcomb — Wed, 18 Nov 2009 15:23:34 GMT

Lynn and all, The first WO FR/FF, sometimes known as the "I", is designated by the "APO" inscription on the body. So, it's often known by that. That was

Field size of sky imaged

moxica17 — Wed, 18 Nov 2009 14:49:29 GMT

Good day I am interested in matching a Canon 40D to a William Optics Zenith Star II 80ED. I would like to know how much sky will be captured (width and breadth

Optically which is better for imaging

skyclear012 — Wed, 18 Nov 2009 04:40:18 GMT

Which telescope is better for imaging between the Megrez 90FD and Megrez 80FD doublet (TMB apograde lens). Are the TMB lens any better than Megrez 90FD lens?

Re: Reaching focus on a Megrez

kupainter — Wed, 18 Nov 2009 01:36:56 GMT

Mark, it is the older version. The one that WO first came out with. I guess you would call it the I. I have the II, but I use that one on my WO66 so I can get

Zenithstar 80 11 ED field flatness?

jill g — Tue, 17 Nov 2009 09:01:33 GMT

Hi, I'm looking at a Zenithstar 80 11 ed to use for imaging purposes. Can anyone tell me if the field is flat enough to use with an APS sized sensor (QHY8)

Re: Reaching focus on a Megrez

Mark Acker — Mon, 16 Nov 2009 04:17:53 GMT

Great info. Did you use the WO FR? Was this the II or III? Thanks Lynn, Mark ... From: kupainter Subject: [William Optics] Re:

Re: Reaching focus on a Megrez

kupainter — Mon, 16 Nov 2009 03:27:21 GMT

Hi Mark, I have a older Megrez 80 II ED triplet. I use Starlight Xpress Cameras (HX916 and SXVF-H9). They both are 17 mm from the front of the camera to the

Re: Reaching focus on a Megrez

Mark Acker — Sun, 15 Nov 2009 20:03:03 GMT

Certainly others more knowledgeable than me can speak to this, but with my DSI IIIc, I have 2 extensions in order to reach focus. I don't want to use a

Photo of the Iris Nebula

notgnirramot — Sun, 15 Nov 2009 17:42:59 GMT

Here is a photo of the Iris Nebula taken last Wednesday. It looked like that would be the only night to image without the moon for the next 10 days, and the

Re: Reaching focus on a Megrez

rbrederode — Sun, 15 Nov 2009 17:22:59 GMT

Im relatively new to this (so may not know what Im talking about :-))...I have the Megrez 72 and tried reaching focus with a Meade DSI and could not reach