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?