LAST EDITED ON Jun-02-13 AT 03:20PM (MST)[p]Looks to me like the aperture range goes to 3.4 That is a decent aperture, but I think I know what you are looking to do with this thing. Not sure that it is your best option.
http://www.dpreview.com/reviews/canon-powershot-sx50-hs
If you look at the top, or the bottom of the page, there is a pull down menu with 12 pages of review on this camera.
Pages 7, 8, and 9 are sample images shot with the different capure modes available, and page 12 is a sample gallery.
If you go to page 6 and scroll down to the picture of the melindas amarillo habanero pepper sauce, you can hold your mouse over the different ISO adjustments, (at the bottom) and get a picture of how the camera handles noise.
Its a very good review of the camera. Is this going to be your new digiscoping toy?
The feature I like the most about this camera is the HDR mode.
Hold your mouse over the HDR on and HDR off, below the picture and it will show you the difference.
Conclusion - Pros:
Very good photo quality for a super-zoom
Enormous 50X, 24 - 1200mm equivalent lens
Optical image stabilization, with Intelligent IS feature that selects the right IS mode for you
Sharp, rotating 2.8" LCD display with 461,000 pixels offers good outdoor and low light visibility
Full manual controls, now with RAW support
Smart Auto mode picks a scene mode for you, can even tell when babies are smiling or sleeping (well, it tries)
Plenty of scene modes and Creative Filters
Dynamic range correction and HDR features improve image contrast (though a tripod is recommended for the latter)
Customizable button, menu, and spots on mode dial
Electronic level (single-axis)
Handy Zoom Framing Assist feature lets you quickly recompose when at the telephoto end of the lens
Records Full HD (1080/24p) video with stereo sound, use of optical zoom, and continuous AF
Support for external flash, wired remote, and lens filters
Conclusion - Cons:
Likes to clip highlights (hint: use DR correction)
Noise becomes pretty intense at ISO 800 and beyond
Redeye a problem (though removal tool in playback mode helps)
Electronic viewfinder isn't great
Slow max framerate of ~1fps with AF (but increasing to 2fps with AF/AE lock and 12.8fps in High Speed Burst HQ mode)
Lens is on the slow side (in terms of maximum aperture); tripod almost a necessity when shooting at 50X zoom
ISO fixed at 80 at shutter speeds at or below 1 second
Below average battery life
Rear dial is flush with four-way controller, difficult to turn
Movies are a bit choppy due to 24 fps frame rate; no manual controls available
Can't access memory card when using a tripod
Cheapo bundle puts manual on CD-ROM, doesn't even include a USB cable anymore