REVIEW OF SUMERIAN OPTICS ALKAID 16” TRAVEL SCOPE
Nov 26 2015 05:38 AM by alexvh
Astrotrac TP3065 Pier Review
Nov 20 2015 08:03 AM by James Waters
Apo-tmosphere: Gutekunst ADC Review
Sep 23 2015 11:18 AM by pbsastro
Optolong LRGB Filter Testing and Comparison wit...
Sep 22 2015 01:41 PM by turbo399
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Astrophotography Reports Archives
This is intended as a brief recap and overview of the development of the very popular line of astronomical imaging cameras and accessories offered by the Santa Barbara Imaging Group
This latest DSI-Pro offering from Meade makes a very sensitive astronomical sensor available to the amateur astronomer at a price pretty much unprecedented for the features offered
Our own imager John Crilly reviews Part I of the Meade RCX400
Learn the basics of webcam photometry.
The ST402 is a B&W camera with temperature regulated Peltier cooling...
Suk Lee shows us what this "ultimate hot-rodded webcam" can do - and how to do it
Deep Sky imaging made easy? Anjal Sharma takes you step by step through using the Canon Digital rebel to take some great astrophotos.
Anjal Sharma takes you step by step through EQ mounting and polar aligning the Nexstar 8i. Learn the tips and tricks to this configuration.
"Take pictures just like these your first night out" proclaims the Meade box. Is it true? Suk Lee examines this question in great detail.
For non-astronomical photography, large format is used because of the versatility of large format cameras in terms of their ability to control perspective (buildings don't look like they're falling backwards) and the plane of focus (e.g. can create VERY deep focus in widefield shots), and because of the quality of image possible with the inherently large piece of film. No matter how fine your lens, film granularity limits how big you can make prints -- the less magnification required, the higher the final quality.
Craig Stark shares a detailed analysis of (and some great images from) this economical imaging camera
Both webcams are *tiny*, not much bigger than the average 20mm Plossl (the TouCam Pro is shown with a Mogg 1.25" nosepiece attached), so neither is going to strain even the smallest telescope. The LPI has a nice feature that the 1.25" nosepiece is actually a screw-on sleeve. Unscrewing it reveals a 0.965" sleeve, a thoughtful touch. Additionally, the 1.25" nosepiece is threaded for standard 1.25" filters.
Thinking of getting into planetary or lunar imaging? Mark Estes walks you through the basics of this rewarding hobby.
Mark Estes subtitles his report as "How to Get Your Astrophotography Fix During Times of Poor Weather"
Mark Estes shares a Solar imaging session with us, and makes it look simple
Dave Cornish shares his techniques for polishing astronomical images with PhotoShop
Suk Lee takes an in-depth look at the operation and capabilities of this inexpensive imaging option
At a zoom of 7.5x, the vignetting begins to diminish and is nearly eliminated at a zoom of 10x in both figures. This, however, is not due to any specific optical phenomena, but rather is a result of the digital zoom of the 707. Essentially, it is simply cropping and resizing the zoom 5x image, therefore reducing the appearance of the vignetting. Yet not all performance is about vignetting. Field curvature or flatness is also an important aspect.