Thursday, February 14, 2013

A Whole New Level

Wow, I thought, as I boosted the ISO to 6400. These are gonna be killer pics. But you never really know what you're going to get until you download your evening's photos onto your computer and look at them on the big screen. All of the following photos are 30-second shots using an 11" SCT as a prime-focus lens for a Nikon D5100. Without an autoguider, 30 seconds is about the limit. Anything longer, you get star trails.
              .

Above, this is M51, The Whirlpool Nebula, in the constellation Canes Venatici, The Hunting Dogs. At 2 a.m., it was almost directly overhead. While the level of magnification is adequate, this picture suffers from too-short shutter speed and too-high ISO.
                   .

Brightened and cropped. Awful! The noise!
                .

Here we have M83, a spiral galaxy in Hydra, The Sea Serpent.
                 .

Brightened and cropped. Ugh! Make it stop, make it stop!
               .

This is NGC 4762, a nebula supposedly resembling a kite, in Virgo, The Virgin.
                .

Brightened and cropped. I swear, last one.
                      .

My alignment went fruit. I tried two new alignments with no success. Ears numb, feet cold, I packed it in.

Posted by Dave

No comments:

Post a Comment

All comments are welcome.