Bower Telephoto Lens

Filter Size: 30.5mm (rear)

f/Stop Range: f/8.0 (fixed)

Minimum Focus Distance: 5.6' (1.7 m)

Magnification: 1:2.7

Angle of View: 4.1° x 2.7° (WxH)
2.7° x 1.8° (WxH) w/ APS-C (15 x 22mm) cameras

Groups/Elements: 6/7

Length: 3.5" (88mm)

Maximum Diameter: 3.0" (77mm)

Weight: 0.70 lb (320g)

The Bower Telephoto Lens is a catadioptric mirror T-mount lens, precision manufactured in South Korea. It is delivered in this configuration with a T-mount adapter to fit the Canon EOS system cameras.

When combined with the T-mount, this mirror lens mounts to any Canon EOS camera and works on both "full frame" cameras like the 5D as well as the "APS-C" style digital SLR cameras. However, the fixed f/8 aperture is not communicated to the camera body. As such, you can use the lens in "M" manual exposure mode or "A" aperture-priority mode only.

Despite this lens' long 500mm focal length, it has a compact 3 x 3.5" size and weighs under 1 pound, making it a bit easier to handle than normal 500mm refractor lenses (it should be used with a tripod or monopod in any case). It also has a much different rendering of out of focus areas than a normal lens; highlights will be doughnut-shaped rings with more saturation and contrast on the edge of the ring than on the center.

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
- 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

Click here for more info!

Filter Size
95mm front, 34mm rear

f/Stop Range
f/6.3 (fixed)

Minimum Focus Distance
6.6' (2.0 m)

Magnification
Not Specified by Manufacturer

Angle of View
4.1° x 2.7° (WxH)
2.6° x 1.7° (WxH) w/ APS-C (15 x 22mm) cameras

Groups/Elements
6/7

Length
4.7" (120mm)

Maximum Diameter
3.9" (98mm)

Weight
1.55 lbs (705g)

The Bower 500mm f/6.3 Manual Focus Lens is a catadioptric mirror T-mount lens, delivered in this configuration with a T-mount for Canon EOS cameras. This lens is precision manufactured in South Korea.

When combined with the T-mount, this mirror lens mounts to any Canon EOS camera and works on both "full frame" cameras like the 5D as well as the "APS-C" style digital SLR cameras. However, the fixed f/6.3 aperture is not communicated to the camera body. As such, you can use the lens in "M" manual exposure mode or "A" aperture-priority mode only.

This lens has a broad diameter and stocky build, making it a bit easier to handle than a normal refractor lens. It also has a much different rendering of out of focus areas than a normal lens; highlights will be doughnut-shaped rings with more saturation and contrast on the edge of the ring than on the center.

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/6.3 mirror lens in T-mount
- Multicoated optics
- Distinct out-of-focus highlight characterization
- White lens barrel helps prevent heat retention
- Accepts inexpensive 34mm filters (upon the rear of the lens)
- Made in South Korea

Click here for more info!