Telyx

Irfanview runs nicely in Wine... it's the only Windows program I use on my Linux Mint computers.  It sure is the bee's knees!

That could be because while the D5300 has to essentially downsample a 24MP image to fit the screen, the D40 only had to downsample from 6MP.

"Super Multi-Coated Takumar" = Pentax.  No idea on the others.  Photos of the lens mounts might help.

ZTE Blade V8 Pro, if it's compatible with your service provider.  $239 USD and the camera is pretty impressive if you shoot in HDR mode or, as I do, use a camera app with adjustable contrast and ...

I have been using Energizer Ultimate Lithium AA cells in my SX130IS for 6 years now with no ill effects.  They last 2-3 months with moderate daily use.

Bumblebee from 5 feet away, Greenfield Village, Dearborn, Michigan 9/7/2013

I use my "rule of thirds" lines only to help keep my camera somewhat level.

The Moon is a basic sunlit scene, so you can use the "Sunny 16" rule-- shutter speed of 1/your ISO, aperture f/16 (for example, at ISO 100 use 1/100 second)... trade off one setting against ...

FreeDCam (free) and Snap Camera HDR (not free) have the option to disable Denoise.