Bower 500mm f/8.0
Manual Focus Telephoto T-Mount Lens
The Bower 500mm f/8.0 Manual Focus Lens is a
T-mount lens, precision manufactured in South Korea.
When combined with the T-mount to fit your camera system, this mirror lens mounts to camera and works on both "full frame" cameras as well as the
The 500mm Bower f/8.0 Manual Focus catadioptric mirror T-mount lens, precision fabricated in South Korea.
Combining with the T-mount to mount on your camera system, this mirror lens attaches to your camera and works on both "full frame" cameras and additionally the "APS-C" style DSLR cameras. T-Mounts are available for all the advanced DSLR systems, and in addition for C-mount systems. In any case, for each situation the fixed f/8 opening is not imparted to the camera body. Thusly, you can utilize the focal point in "M" manual presentation mode or "A" aperture priority only.
Regardless of this len's long 500mm focal length, it features a compact 3 x 3.5" size and weighs just under 1 pound, making it somewhat simpler to handle than typical 500mm refractor lenses (it ought to be utilized with a tripod or monopod regardless). It likewise has a very different rendering for out of focus areas than a typical lens; highlights will be donut formed rings with more contrast and saturation on the ring's edge than on the center.
Several organizations made catadioptric lenses all through the later part of the twentieth century. Nikon built them (under the Mirror-Nikkor and later Reflex-Nikkor) and Canon both offered a few designs, for example, 500 mm 1:8 and 1000 mm 1:11. Smaller organizations, for example, Tamron likewise offered their own variants. Of the major manufactures, as of now just Sony (previously Minolta) makes a 500 mm catadioptric lens for their Alpha camera range. Samyang offers an assortment of extraordinarily priced optics, conveying a great deal of optical capacity for very little money. These rebranded catadioptric focal points are accessible under the Bower, Opteka, Phoenix, Rokinon, Sakar, Vivitar names.
Mirror lenses can create pictures and under carefully picked conditions they may even deliver really great ones. Be that as it may, these circumstances are uncommon and most will have unsteady background blur. Most miror lenses experience the ill effects of a somewhat mediocre optical performance. This may all be good for individual purposes and for documentation yet in all likelihood you'll not have the ability to offer such pictures for sale. In this manner a classic (refractive) lens like a 400/5.6 fix-focal length or even a xx-500mm zoom or perhaps a 70-300-f/4-5.6 lens using a 1.4 or 2x teleconverter is generally a superior and more serious approach. In any case mirrors are very cheap (yet you get what you pay for).
(To rephrase the paragraph above: Mirror lenses are Junk!)
• Economical 30.5mm rear filter system
• Compact and light-weight
This lens is an ideal candidate for astrophotography use when mounted to a Vixen GP2 Photo Guider (or other motorized equatorial telescope mount).
• Fixed-aperture 500mm f/8 mirror lens in T-mount
• Multicoated optics
• Distinct out-of-focus highlight characterization
• Excellent close focusing capacity
• Accepts 30.5mm filters at rear of lens barrel
• Made in South Korea