Should Green18 go back to his old icon

Right place, right time Larry.

 

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with the winter coming one of the most noticeable set of stars out there is Orion. In it there are several Nebulae such as M42, M78 and the horsehead & flame.
20150912_OrionNebulae3-01 by , on Flickr

in relation to the imaging circle .... it's basically for DX. FX has a dark ring around it. I was searching for my 40k high airplane at 4,000mm that clearly shows the dark ring around it but I can't find it right now.

as to DSLR, MIrrorless and the cooled cameras such as converted Nikon D5x00s. DSLR has a mirror slap. In my scopes and tests I've found I need a 5 second pause before initiating the sensor to eliminate all motion. This is being super critical as in deep space you may end up cropping alot and I have tests showing this the best pause time. Thus you need Bulb mode. Some lower end Nikons have a pause which I think only is 3 seconds - not enough time in my book.

Mirrorless. No mirror slap. Modern recent mirrorless at crop and FullFrame are fine for astrophotography. Some older SONYs have a software fiasco nicknamed "star eater" - very appropriately named. So make sure any used one's software doesn't do that.

Once you get above 20 minutes and you consistently do that you maybe should look at cooled cameras. The sensor gets really hot and you start getting pixels getting burnt out, and thus dead pixels. The cooled cameras allow the sensor to stay cool and prevent overheating. but conversely, by that time you have a really nice telescope and higher end computerized tracking system.

 

Heck. I just snap photogs.......

 

sometimes there is too much perceived focal length .. here's 9,000 mm
20170508_Moon2_9000mm (6 of 9) by , on Flickr

 

It was a fun thread. Yes I'm all what you say. I like to answer as i read thru thread. Thats me. Guilty. I did like greens picture. Was funning with green. Sorry I'm really not that technical nor serious. It was for fun @BooksB4Coins. All that photography stuff ran it right into the ground. You feel me

 

Sometimes ya win, sometimes ya lose.........

 

Sunspots is always fun too ... just don't burn up your camera without the proper equipment
20140827-NKN_7892 by , on Flickr

 

That's what makes us special, dear Lady.......

 

Love ya........

 

And I ain't a women, but I'd like to honor you old girl.....

 

Good Lord, what have I done? Just remembered something neutral.......dear girl is fantastic.....

 

Now thats beautiful.

 

Wink

 

Think of it this way: for focus, every celestial object is effectively at the same distance. No need for autofocus, and no issue with bokeh.

 

That is very cool. Last year we were center of the eclipse path. I planned a day off in my backyard on a lazy chair with a cooler of my favorite adult beverage. The day of the eclipse my wife insisted on meeting a group of photographers setting up in a field. I protested and lost the protest. And as it turned out she took a series of the most awesome photographs I ever saw. I was proud of the old girl. I can barely snap a photo with a smart phone........ What was this thread about??

 

There's a lot of beautiful shapes of gases out in space. Can't see much with your eyes though. https://www.spacetelescope.org/images/archive/category/nebulae/

In Orion, there's also the Horses Head nebula

my camera sensor tends to like bluish/ purples for some reason.

Although many of them are taken with many images that are overlaid on each other.
Astrophotography can become quite complex.

 

Well? We're waiting...