User manual
Bower 500mm f 8.0 Manual Focus

User Manual for Bower 500mm f 8.0 Manual Focus Telephoto Lens for Pentax Screw Mount

• Product category: SLR Lenses Bower
• Brand: Bower
• Description and content of package
• Technical information and basic settings
• Frequently asked questions – FAQ
• Troubleshooting (does not switch on, does not respond, error message, what do I do if...)
• Authorized service for Bower SLR Lenses

Product description

• Bower 500mm f/8.0 Manual Focus Telephoto T-Mount Lens The Bower 500mm f/8.0 Manual Focus Lens is a catadioptric mirror 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 "APS-C" style digital SLR cameras.  T-Mounts are available for all the digital SLR systems, as well as for C-mount systems.  However, in every case 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 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
  UPC: 636980500072
• Bower T-Mount to Pentax K Mount Adapter The Bower T-Mount to Pentax K Mount Adapter allows you to mount T-mount lenses, telescopes, microscopes, and other optics to your Pentax K-mount camera body. When in use, automatic camera functions, such as autofocus and exposure control, will not be available and must be set manually. UPC: 636980702759

• T-Mount to Pentax K Mount Adapter

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Technical parameters

• Bower 500mm f/8.0 Manual Focus Telephoto T-Mount Lens

  Focal Length	500mm
  Maximum Aperture	f/8
  Minimum Aperture	f/8
  Lens Mount	T-Mount
  Format Compatibility	Full-Frame
  Angle of View	5 Rating 68% users recommend this product to others. And what about you? This product has already been rated by 24 owners. Add your rating and experience with the product. Discussion Ask our technicians if you have a problem with your settings, or if anything is unclear in the user manual you have downloaded. You can make use of our moderated discussion. The discussion is public and helps other users of our website who may be encountering similar problems. The discussion is empty - enter the first post Post a new topic / query / comment: Items marked with * are required. Your name *: E-mail : Subject *: Message *: Your email address will not be displayed. Do not forget to fill it in if you want to receive a reply to your enquiry/contribution. Processing of personal data in accordance with GDPR