http://groups.yahoo.com/group/William-Optics/ William Optics Telescope Discussion Group Sat, 08 Jun 2013 01:52:47 GMT Gregg Winter http://groups.yahoo.com/group/William-Optics/message/22405 http://groups.yahoo.com/group/William-Optics/message/22405 Thanks Mike, it sounds as though it should solve my problem as it did yours. Gregg Fri, 07 Jun 2013 18:09:22 GMT Mike Tapper http://groups.yahoo.com/group/William-Optics/message/22404 http://groups.yahoo.com/group/William-Optics/message/22404 Cregg, Email William at Williamoptics@... and ask for the 2" screw-on extension tube for the 3.5" focuser. Be sure to specify it's for the 110 FLT Fri, 07 Jun 2013 14:51:39 GMT Gregg Winter http://groups.yahoo.com/group/William-Optics/message/22403 http://groups.yahoo.com/group/William-Optics/message/22403 Hi Mike, Ah, this is great news! I did not know that this part existed. By chance do you know what this piece is called or have a part number? It's just tht Fri, 07 Jun 2013 09:42:49 GMT Mike Tapper http://groups.yahoo.com/group/William-Optics/message/22402 http://groups.yahoo.com/group/William-Optics/message/22402 Contact WO. They have a 2" extension that screws onto the camera rotator (after you remove the end piece) and is made for the 3.5" focuser. It solved my Fri, 07 Jun 2013 03:06:11 GMT skyguycan http://groups.yahoo.com/group/William-Optics/message/22401 http://groups.yahoo.com/group/William-Optics/message/22401 Hi Guys, I have had this OTA for about 5 years now and use it strictly for imaging. Up to a couple of months ago I have been using a Meade DSI ll Mono for most Fri, 31 May 2013 22:33:48 GMT Russell http://groups.yahoo.com/group/William-Optics/message/22400 http://groups.yahoo.com/group/William-Optics/message/22400 Hi, I have a Megrez 120 ED APO operating at F 7.5 Can anyone tell me what the correct distance from the FR to the sensor is for a Canon 1100D T3? Thanks Russ Fri, 31 May 2013 00:00:11 GMT Craig http://groups.yahoo.com/group/William-Optics/message/22399 http://groups.yahoo.com/group/William-Optics/message/22399 On the most recent version of the AFR-IV, if you screw off the nose piece, a larger diameter disk with male threads comes with it. Would anyone happen to know Wed, 29 May 2013 02:47:31 GMT underdriven255 http://groups.yahoo.com/group/William-Optics/message/22398 http://groups.yahoo.com/group/William-Optics/message/22398 ... Okay, thanks. Unfortunately, it doesn't tell me much about APS-C size field flatness with a Barlow... Keith Tue, 28 May 2013 12:24:40 GMT Ray Hurst http://groups.yahoo.com/group/William-Optics/message/22397 http://groups.yahoo.com/group/William-Optics/message/22397 That's the full image. This was taken with a small chip DMK camera. 640x480. Haven't tried it with a DSLR. From: William-Optics@yahoogroups.com Tue, 28 May 2013 06:09:28 GMT underdriven255 http://groups.yahoo.com/group/William-Optics/message/22396 http://groups.yahoo.com/group/William-Optics/message/22396 ... Hi Ray. Nice sunspot image. Was that the whole image, or was it cropped? I'm curious whether the whole field is flat with a Barlow... Thanks, Keith Tue, 28 May 2013 02:52:19 GMT Ray Hurst http://groups.yahoo.com/group/William-Optics/message/22395 http://groups.yahoo.com/group/William-Optics/message/22395 Keith, I used a barlow on my GTF-81 with no problem. I used a 2 inch extension. Ray http://www.flickr.com/photos/rayhurst_photos/8559557323/ From: Mon, 27 May 2013 02:08:41 GMT Jim Hendricks http://groups.yahoo.com/group/William-Optics/message/22394 http://groups.yahoo.com/group/William-Optics/message/22394 Yes...I had thought of tape and elastic bands but then I thought that was a bit Heath Robinson for a scope which is otherwise rather well made. I think I will Sun, 26 May 2013 15:28:53 GMT Paul http://groups.yahoo.com/group/William-Optics/message/22393 http://groups.yahoo.com/group/William-Optics/message/22393 Tape. Sent from my iPad Sun, 26 May 2013 13:00:52 GMT Jim Hendricks http://groups.yahoo.com/group/William-Optics/message/22392 http://groups.yahoo.com/group/William-Optics/message/22392 Hi Timm Yes...I've had it off...the only way to do it is to remove the cell...or the focuser whichever you prefer but I removed the cell as I wanted to blow Sun, 26 May 2013 04:59:52 GMT underdriven255 http://groups.yahoo.com/group/William-Optics/message/22390 http://groups.yahoo.com/group/William-Optics/message/22390 For anyone who has a GTF81 or GTF102, I am curious how the WO scopes with built-in flattener perform with a Barlow when imaging? In a "normal" refractor if a