Bower 500mm f/8 Manual Focus Telephoto T-Mount Lens

Bower 500mm f/8 Preset Lens With T-Mount Adapter For Pentax K

Bower 500mm f/8 Preset Lens With T-Mount Adapter For Pentax K

B&H # BO5008PKPK (B&H Kit)

Kit includes:

Bower 500mm f/8 Preset Lens With T-Mount Adapter For Pentax K Bower 500mm f/8 Manual Focus Telephoto T-Mount Lens Bower T-Mount to Pentax K Mount Adapter

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Bower 500mm f/8.0 Overview

  • 1Description

The Bower 500mm f/8 Preset Lens is a lightweight, compact lens, designed to makes it the perfect long range lens for sports, wildlife and other telephoto photography applications. The computer-designed multi-coating allows flare-free photographs under extreme lighting conditions, resulting in high contrast and better color. Lens has a fixed aperture of f/8 and an optional matched 2x extender will boost magnification to 1000mm with no loss of optical quality.

  • Bower 500mm f/8 Manual Focus Telephoto T-Mount Lens

    The Bower 500mm f/8 Manual Focus Lens is a classic refractor-style T-mount lens, with an aperture diaphragm in the middle of the lens body to stop down the aperture when necessary.  However, it is assumed that much of the shooting with such a lens will be at its maximum f/8.0 aperture, with a tripod, monopod, or other such support.

    When combined with the T-mount to fit your camera system, this super telephoto 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, and even for C-mount systems.  However, in every case the 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' sophisticated achromatic refractor design yields images with pleasing peak contrast and well controlled flare.  It can be used at maximum aperture on a very bright day for some images of moving subjects.

    This lens can also be used as a handheld telescope by adding Lumicon's LA1070 adapter along with a 1.25" 45°/60°/90° diagonal and any 1.25" eyepiece, or for astrophotography by using on an SLR mounted to a Vixen GP2 Photo Guider or other motorized equatorial telescope mount.

    Achromatic refractor 500mm f/8 lens in T-mount
    Multicoated optics
    Knurled focus ring to the front of the lens
    Accepts 67mm filters on the front of the lens
    Fixed tripod collar
    Meant for use with monopods, chest supports, or tripods
    UPC: 636980500430
  • 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
  • Bower 500mm f/8 Manual Focus Telephoto T-Mount Lens
    Focal Length 500mm
    Maximum Aperture f/8
    Minimum Aperture f/32
    Lens Mount T-Mount
    Format Compatibility Full-Frame
    Angle of View 5
    Minimum Focus Distance 33' / 10 m
    Optical Design 4 Elements in 4 Groups
    Focus Type Manual Focus
    Image Stabilization None
    Tripod Collar Yes
    Filter Size 67 mm (Front)
    Dimensions (DxL) 2.76 x 11.73" / 7.01 x 29.79 cm
    Weight 1.4 lb / 640 g
    Packaging Infocdfzbtycsusdsaczdfuwueuu
    Box Dimensions (LxWxH) 14.6 x 3.5 x 3.4"
  • Bower T-Mount to Pentax K Mount Adapter
    Camera Mount Pentax K
    Lens Mount T-Mount
    Packaging Info
    Box Dimensions (LxWxH) 2.8 x 2.7 x 0.9"

Bower 500mm f/8.0 Reviews

500mm f/8 Manual Focus Telephoto T-Mount Lens is rated 4.2 out of 5 by 38.
Rated 4 out of 5 by from Great lens for a great price! I use this lens on my Canon 70D for nature and wildlife shots and I love it! Sure, it is a T mount, so there is no autofocus, image stabilization, or in camera aperture control, but due to the price and optical quality of this lens that is irrelevant. It also gives you a greater sense of pride in your work because you were the one that got that great shot, not your fancy lens. Anyways, once you get the focus right the clarity of the photos is astounding for the price of the lens! There is also very little aberration and color fringing, and no vignetting. For the more advanced photographer, or even a beginner, I highly recommend this lens!
Date published: 2015-01-16
Rated 4 out of 5 by from Good value for money I used this lens with my Nikon D 5000 and Nikon D 90. I tried taking just few photos with tripod. It is better to use a tripod and the camera in manual mode.Use the LCD display of the camera as reference for adjusting the lighting by changing the aperture of the lens.It is easy to focus and gives excellent pictures if light is good.I have also tried few more birds and moon.The screws of the T mount had to be adjusted to mount the lens is a very good product for the price offered.I have links to my photos taken using this Lensone at normal day light and one at low light 1. ...
Date published: 2011-07-11
Rated 4 out of 5 by from Great for the price. I bought this lens for bird photography. I was thinking of dropping a grand for the sigma 50-500 but ended up just sticking with this since I wasn't sure if I was something that I would really get into. After getting this lens I didn't expect a whole lot out of it and I didn't get a whole lot. But I got what I paid for and the optics are very sharp. It has a pretty strong construction with an exception to the mount. I have noticed a fair amount of coma when shooting at f/8 but that was to be expected. I generally just bump my iso up to 800, shoot at 1/500th of a second and f/11 isn't so bad from there.
Date published: 2010-11-08
Rated 5 out of 5 by from excellent for wildlife I find this lens to be a good wieght, it is easy to point at the moon or birds. It has an easy and accessable focus ring. As an added bonus with this lens you can adjust the apature. It uses a 67mm filter which I acquired through a local business, not B&H .... I also use this lens for stellar pics, pressently there has been light cloud cover, but even still I have acquired some amazing pictures of the moon. This lens is excellent. I did remove the mounting ring, as the lens is not too heavy and I preffer to mount my camera body onto a small tripod for still, or low light pictures. This lens has also captured wild close up images of vultures feeding on a carcus :).
Date published: 2011-04-15
Rated 5 out of 5 by from For this price you get a nice lens For this price, 5 stars. A very nice, surprisingly well made and solid lens that will take me some time to learn how to master a long manual focus lens in the field. Not too heavy for a long lens attached to a D90, but I have been using my left hand to hold this 500mm lens while taking pictures of hawks jumping off of branches. I did hope that this lens would be a little sharper at longer ranges, but again, for this price, hard to complain. The included mount is not ideal as it can start to come lose while adjusting focus. I could not tighten it enough to prevent it coming lose again.
Date published: 2009-12-24
Rated 5 out of 5 by from The Right Tool in the Right Place Considering how inexpensive this lens is it performs very well. As a nature photographer, it gives me a distinct, and light weight, advantage of getting still images of wildlife that nearly fill the frame - without the subject's awareness of my presence. Definitely a good addition to your existing lenses! Keep in mind that it is manual focus and that because of its focal length you require a tripod and a remote (or cable) release for blur free images.
Date published: 2011-01-12
Rated 4 out of 5 by from It takes a bit of patience I use this lens on a Sony a330 DSLR , for wildlife,birds ,and landscapes . It is built well . I like the metal construction .I think its a great value for the money . I dont like it being f/8 . It can produce good photos , if you have the patience , as it is manual focus , and getting the right shutter speed takes time . I have been able to get a clear photo at 50 yard and can count the needles on a branch of a pine tree . A sturdy tripod is a must have . I have a cheap one and a breeze will make camera shake .
Date published: 2010-07-08
Rated 3 out of 5 by from Very decent lens, after modification. This lens can produce great images, you just have to understand there is no communication with the camera. This means you put your camera on manual, guess at shutter speeds, and adjust them after looking at the picture. I've found I have a pretty good feel for exposure now, so I usually get it close on the first try. I also bracket exposure, so I'm sure to get a properly exposed image. This, coupled with the manual focus, means it might be tough to use for action shots, but for wildlife, it's not so much of a problem. The picture quality is very good though, so it's worth the inconvenience, especially when you look at the price of everything else in this focal length. There is a major problem though; I ended up correcting it myself, but some people may not be able to do what I did. On my Nikon D70 it wouldn't focus on infinity. You could turn the focus ring all the way, and it just wasn't enough. I ended up sending the first lens back for an exchange, but when the second one exhibited the same problem I had to figure out what was going on. The problem is the lens is too long with the Nikon T-mount adapter. I can't say if other mounts would have the same problem, but I would say any prospective customer should keep this in mind. I fixed it by gradually grinding off material on the end of the lens tube, until it was the right length. Problem solved, but admittedly, an extreme measure. In conclusion, for me the lens was a great purchase, which has produced many fine, very sharp images (and I'm a pretty harsh critic of lenses), all for less than the cost of a tele-extender. If you can deal with these issues, I think you would be very pleased with the pictures you can take with this lens. Rating on picture quality alone, I'd have given it 5 stars.
Date published: 2010-10-25
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Bower 500mm f/8.0 Q&A

Bower 500mm f/8.0 Accessories

Designed For Use With:

  • Pentax K-1
  • Pentax K-1 II
  • Pentax K-3 II
  • Pentax K-70
  • Pentax K-S2
  • Pentax KP
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