Metric (°C / mm) | Imperial (°F / inches)Back to topTop 10 UK places to go in AugustTraditionally seen as the most summery of months, destinations across the UK often shimmer under the long sunny days of August, which, in turn, means it really is the best time to get out and ...
Four-inch APOs are made with many different image-circle diameters. Most have two-inch focusers, which limits the image circle to roughly 2 inches, or 50.8 mm. Nearly all of them offer a photographically suitable field less than 20mm in diameter without the addition of external optics (if t...