From: "milton_aupperle" <milton@outcastsoft.com>

Date: November 7, 2009 1:19:43 PM MST

To: Astro_IIDC@yahoogroups.com

Subject: Re: full moon...


Mark;


The image doesn't look sharp at all.


Was their turbulence or not? This is what my turbulence looks like:


http://groups.yahoo.com/group/Astro_IIDC/files/Planetary/SaturnAverageSeeing_MJA20090404.mp4


Things that affect Sharpness are


1) Poor focus


2) Turbulence


3) Poor Mount Tracking


4) Fog, clouds and Dew


5) Dirty Optics (including dirt / condensation on the CCD).


6) Not allowing the mirror / optics / Camera to cool down to ambient temperature, which also produces tube current.


Any one or combination of the above produces poor images.


HTH..


Milton Aupperle



--- In Astro_IIDC@yahoogroups.com, Mark Gaffney <markgaffney@...> wrote:


Milton,

Here it is in Files (at least Files will let me upload a Tiff file-I  

always thought things had to be converted to jpegs for Yahoo but maybe  

that`s just in Photos?)

http://f1.grp.yahoofs.com/v1/oLX1SvSQE_EMLpGNpDgXrefKY2fhxWlXHWWJbRddjME8vnQRp8WeH3Udsnn9x6gxmheJnr9QUqODUZmCWC7E2pQ5qqQA1ktTuDgK

I was having trouble making it much sharper than this (I did tweak the  

focus knob numerous times when doing these trying to make it finer)  

but thought conditions were quite good-there was no dew for example  

which is often a problem, even with my dew strip. I`ve hurt my back  

bringing the mount & 2 x 11lb weights inside because of the recurring  

rain periods we`re getting. I`d brought in the C9.25`s tube but if I`d  

waited to undo the screws etc. on the mount I`d have gotten soaked!  

Generally speaking the Telegizmous cover is good but I noticed some  

moisture on top of the tube after removing it after a shower the other  

day..I think getting soaked is preferable to back strain though  

somehow...!


Mark.

On 08/11/2009, at 4:38 AM, Milton Aupperle wrote:


Mark;



Why not post it to the Files section, so we can see it at full size?  

Anything posted to Yahoos idiotic pictures section gets reduced to  

480x360 pixel size, which blurs it.


As far as I can tell it doesn't look sharply focussed or you had  

significant turbulence when it was shot, which makes achieving focus  

difficult and capturing sharp frames difficult. Some nights here I  

can't even bring the moon into sharp focus visually with a 25 mm  

eyepiece at prime focus on the C8. But I live under the Jet Stream  

and some nights I am surrounded by a loop of it on all 3 sides.


Also, a general question to the group.


I'm getting really fed up with Yahoo for hosting the Astro IIDC  

group. If you've ever used the search engine here, it's absolutely  

terrible at finding previous articles regardless of how you set up  

the search query. Luckily I keep a copy of most of me "important"  

FAQ type e-mails to the group so that I can flip through by date to  

find the original posted onto the group and then refer you back to  

the original thread.


So I'm wondering what people think about possibly moving to another  

group host, like Google groups for example? I have not spent any  

time looking into the pros and cons of other  hosting services yet,  

but I will if people feel that Yahoo is just sucking too much.


Thanks in advance for your opinion...


Milton J. Aupperle



On 7-Nov-09, at 10:08 AM, Mark Gaffney wrote:


Hi, Here`s a shot taken on the 5th November (full moon) with my PGR

Scorpion 1628 x1236 pixel mono camera;

http://groups.yahoo.com/group/Astro_IIDC/photos/album/1179371742/pic/1436279267/view?picmode=&mode=tn&order=ordinal&start=1&count=20&dir

I`m wondering am I slightly out of focus, or can the haziness be

accounted for by the light of the full moon?