Opteka 6.5mm f/3.5 Fish-Eye CS

The Opteka 6.5mm f/3.5 Fish-Eye CS is a camera glass that captures a wide-angle view of up to 180 degrees, making it suitable for landscape and architectural photography. It is a manual focus photographic lens that allows you to adjust the focus according to your needs. The lens has multiple elements that are coated to reduce glare and improve image quality. The build quality is good, and it is durable enough to withstand regular use. The lens has a fixed aperture of f/3.5, which means it can capture good quality images in low light conditions. The resolution of the lens is good, and it can capture sharp images with good contrast. There are alternatives available in the market, but the Opteka 6.5mm f/3.5 Fish-Eye CS is a good option if you are looking for a budget-friendly fisheye lens. The lens is suitable for those who prefer manual focus over autofocus. The lens has a good bokeh effect that can be used to create artistic images. The manufacturing time of the lens is not known, but it is widely available in the market.

Optical design

Has 6 aperture blades, this number of blades are commonly used. Having rounded blades provides out of focus circle shape closer to a circle. Full frame equivalent focal length is 9.0 mm. Average brightness in this league

Physical characteristics

Weights 414 grams so plan ahead, carry only if really necessary. 75 mm long, requires consideration if you want to carry in the camera bag.