Jim, the exposure would depend on the camera, filter, and focal ratio of your system. I get saturated Moon shots with Astronomik 13nm FWHM filter at F/7 with...
55206
L.Knoll
lknoll1234
Nov 2, 2006 1:38 am
I agree with Dennis. With the amount of current (10-100KA typical) in a lightning surge, the thin coating of conductive paint, even if it had very low...
55207
Michael Sherick
michaelsherick
Nov 2, 2006 2:35 am
The conductive coating idea sounds less than ideal for handling a lightning strike. As in composite aircraft, conductive laminates are more for bleeding off...
55208
Daniel Perry (califor...
dannysperry
Nov 2, 2006 5:36 am
Does anyone have any experience with TMB Optical scopes for imaging. not just a TMB-designed objective but a complete scope from TMB Optical? I'm curious...
55209
francislongstaff
francislongs...
Nov 2, 2006 7:12 am
Hi Paul, Thanks for the feedback about dithering vs. dark subtraction. Your results sound very interesting! I'm looking forward to actually trying to do the...
55210
Dale
nraider217
Nov 2, 2006 11:03 am
This is a late posting of this past summers M16 that I finally got around to finish up. I have been working on not trying to push so hard in development. I had...
55211
astroman_1a
Nov 2, 2006 11:06 am
Hi.I have an 80mm ED with an standard focuser.Sometimes ,even when really tightened,the camera slips back.I got the camera to scope adapter from Orion.Is there...
55212
Dale
nraider217
Nov 2, 2006 11:10 am
You do a wonderful job of making your shots look so deep yet natural with good color in both the main subjects and the stars. That is not easy. Great shots!...
55213
Aurigema, Andrew N. (...
eosraptor1
Nov 2, 2006 12:03 pm
Scott, I have several ex-USAF 3 meter Astrodomes ( made in California about 30 years ago ) and none are lightening protected. They don't need to be. They are...
55214
Mike Broder
miken202od
Nov 2, 2006 2:02 pm
I'm still a novice when it comes to post processing my shots. I have a question regarding the Shadow/Highlight feature in photoshop. I really never noticed...
55215
George Hatfield
iron_genny
Nov 2, 2006 3:11 pm
I usually use a Borg77ED for imaging with my Canon 20D, but the image scale is quite large (about 3 arcsec/pixel). This makes for relatively easy imaging, but...
55216
ragreiner4
ragreiner1
Nov 2, 2006 3:12 pm
I have had a TMB 130 f 6 scope for about a year now. it is the best optic I have ever used. I have a field flattener for mine. All totally TMB. This scope...
55217
(no author)
(no email address)
Nov 2, 2006 3:50 pm
Ward, I imagine I will be in your same position next year sometime. I am in the process of building a home observatory and will have a new scope and such to...
55218
Mark de Regt
soccernutsea...
Nov 2, 2006 4:08 pm
George, It does make sense. You can always resize an image to "hide" imperfections, which performs a similar function as binning (ignoring things like the...
55219
Wodaski - Yahoo
rwodaski
Nov 2, 2006 4:49 pm
YOu may have been lucky, but you are incorrect about how charge builds up on a fiberglass dome. There are many ways for charge to build up. Wind against the...
55220
George Hatfield
iron_genny
Nov 2, 2006 5:27 pm
Mark.... When I'm using my Borg, I guide with Guidedog through my LX200. If I start using the LX200 for some imaging, I plan to guide through the Borg,...
55221
Adam Block
ngc1535
Nov 2, 2006 5:27 pm
Hi Mike, This is a technique that I have employed (can I take credit for it? <g>) for years. Shadow/Highlights is a wonderful tool. It does not replace DDP-...
55222
Rainer
rsbfoto
Nov 2, 2006 5:29 pm
Hi George, You say you get 3 arcsec per pixel and this is with the original FOV. Now when you BIN you take instead of 1 pixel 4 pixel to make one bigger pixel,...
55223
ayiomamitis
Nov 2, 2006 5:36 pm
Adam, I would like to thank you publically for the sample video you have on your website surrounding the correction of small dark artefacts (usually due to...
55224
mainenebula
Nov 2, 2006 5:42 pm
... Dale - Very attractive image. Looks like you made some good decisions on when to stop. Dan in NY...
55225
Dennis Persyk
dennis_persyk
Nov 2, 2006 6:27 pm
Hi Ron, I hesitate to challenge your posting on fiberglass dome charging as I have great respect for you as a writer and imager. I cannot dispute your...
55226
Wodaski - Yahoo
rwodaski
Nov 2, 2006 7:27 pm
I don't have the kind of data you want. I do have a couple of lightning/static experts who consult for me, each with over 30 years in the field. One is a...
55227
Anthony Ayiomamitis
ayiomamitis
Nov 2, 2006 7:31 pm
Dear Friends, Finally a small break in the bad weather we have been experiencing the past few weeks with a brief 3.5-hr window of opportunity after the moon ...
55228
George Hatfield
iron_genny
Nov 2, 2006 8:15 pm
Rainer....I was thinking of doing the 2 x 2 software binning for LX200 images where the image scale is too small. Using Ron's calculator, if I bin the pixels...
55229
Mark de Regt
soccernutsea...
Nov 2, 2006 8:58 pm
George, Sorry, but it's not clear to me what your real goal is. If you want to image with your LX200, but know that the mount isn't steady enough for doing ...
55230
socratesmg
Nov 2, 2006 9:56 pm
For those considering enhancing their image contrast by blackening their interior OTA and focuser parts, I wanted to pass along a summary of my recent internet...
55231
George Hatfield
iron_genny
Nov 2, 2006 10:21 pm
What I'm trying to do is to get to an image scale with my LX200 of about 1.5 without going to a 3.3 FR and all the problems that encompases. In other words,...
55232
Mark de Regt
soccernutsea...
Nov 2, 2006 11:27 pm
George, You're on the right track; it's all simple arithmetic. I don't know the pixel size on the camera, but you've probably done the arithmetic correctly. ...
55233
L.Knoll
lknoll1234
Nov 3, 2006 12:53 am
Wow! What a bonanza of good information. Thanks Michael! ... From: socratesmg To: ccd-newastro@yahoogroups.com Sent: Thursday, November 02, 2006 4:13 PM ...
55234
Jim Miller
jfmiller7
Nov 3, 2006 2:36 am
Thanks Tom. Are these multiple frames then stacked? does that increase contrast, or must they be stacked to get the signal strength high enough? regards. Jim ...
