Taken a picture of your focusing mask?

citivolus (Ric) · #1 01-08-2009, 04:11 AM

No, it isn't what you think. Or, maybe it is

I'm fairly certain we've all done it. Some of us probably do it more than others. I just did close to an hour of subs on NGC 253, only to look at the subs on the camera and think that I had drift. I then looked over at my scope and noticed the focusing mask in place.

I figured I'd go ahead and process it anyway, as a memento to the occasion.

So I present to you, NGC 253 a la Bahtinov.

10x 5 minute exposures, FLT98

So, who else is guilty and willing to post the evidence?

mexhunter (César) · #2 01-08-2009, 06:55 AM

Hi citivolus:
Doubtlessly it is a very original photo. The star striae shine it much; also focus is excellent.

Many greetings
Cesar

Dennis · #3 01-08-2009, 07:32 AM

Guilty as charged, although I picked up my mistake on the 1st sub frame. I once took a 20 minute, hand guided shot (on 35mm film) of Eta Carina with my old Hartman Mask on….

Cheers

Dennis

Omaroo (Chris Malikoff) · #4 01-08-2009, 07:47 AM

Quote:

Originally Posted by Dennis

I once took a 20 minute......

Once? LOL! For me - every time! That's me - focus and then set a sequence of 10 short subs - go!

D'oh!

Alchemy (Clive) · #5 01-08-2009, 07:53 AM

i did it once but i think i deleted the subs after i realized..... the next day

Hagar (Doug) · #6 01-08-2009, 09:04 AM

Nice focus on the focus. I have taken some lovely 20 min exposures of a focus mask but they all were deleted.

Tamtarn · #7 01-08-2009, 09:13 AM

Have also done this once, but realised what had happened when viewing first 10 min sub.

RB (Andrew) · #8 01-08-2009, 09:27 AM

Too funny Ric !

At least you have a unique NGC 253 to show off.

I've done a similar thing a few years ago but mine was using the ED80 on the moon.

It was extremely difficult to get the full moon in the fov, let alone focus, until I realised I had left the solar filter on from earlier in the day while doing some solar imaging.

TrevorW · #9 01-08-2009, 10:19 AM

Never (I don't use a focusing mask)

nice pic by the way

Omaroo (Chris Malikoff) · #10 01-08-2009, 10:23 AM

Quote:

Originally Posted by TrevorW

Never (I don't use a focusing mask)

Hmmm.....

citivolus (Ric) · #11 02-08-2009, 04:37 AM

At least now I'm not the only one

Quote:

Originally Posted by RB

...until I realised I had left the solar filter on from earlier in the day while doing some solar imaging.

Hey, that sounds like something I would to!

Regards,
Eric

multiweb (Marc) · #12 02-08-2009, 09:58 PM

Quote:

Originally Posted by TrevorW

Never (I don't use a focusing mask)

Ouch!

renormalised (Carl) · #13 02-08-2009, 10:05 PM

How about leaving a lens cap on....done that a couple of times when visually observing. Wondered why the sky was so black!!!.

Well, I can say this about your piccie...they're the most tightly focused stars I've ever seen!!

RobF (Rob) · #14 02-08-2009, 11:40 PM

Actually, you could be on to the start of a fad here Ric. You should shoot a bright cluster like the Pleiades, post a pic, then wait for someone to ask how you get such groovy diffraction spikes......

strongmanmike (Michael) · #15 02-08-2009, 11:59 PM

Hmm? that's just lots of Ant Nebulae (aka Menzel 3) sent to munch on NGC253 http://members.pcug.org.au/~stevec/ant_full.jpg

renormalised (Carl) · #16 03-08-2009, 12:16 AM

Quote:

Originally Posted by strongmanmike

Hmm? that's just lots of Ant Nebulae (aka Menzel 3) sent to munch on NGC253 http://members.pcug.org.au/~stevec/ant_full.jpg

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