Showing posts with label mirror lens. Show all posts
Showing posts with label mirror lens. Show all posts

Phoenix P09060 500MM F:8 Mirror Lens in T Mount Review

Phoenix P09060 500MM F:8 Mirror Lens in T Mount
Average Reviews:

(More customer reviews)
The Phoenix 500-mm reflex telephoto lens is a way to get long telephoto shots at a diminutive fraction of the cost of conventional telephoto lenses. It's very light, very comfortable to hold, focusses quite easily (the focussing ring turns smoothly and has a conveniently long motion), has a 77-mm-diameter front thread (lens shades are easy to find), and can produce definitely acceptable 9" x 12" prints if you know how to post-process digital images. If you're accustomed to using a DSLR and a not-lightweight lens, you won't need a tripod unless you want insurance against camera shake.
If you've read other reviews about how the donut-shaped out-of-focus highlights are ugly or distracting, I dunno: google "mirror lens bokeh" and check out the images. Yes, the bokeh is sometimes offputting, but the depth of field these lenses produce is so shallow that the out-of-focus highlights are more often blurred completely out of existence. If you can separate your subject from foreground and background--as you want to do with nature shots, as happens automatically with shots of aircraft--the donut bokeh doesn't happen. You can learn to avoid circumstances in which it looks weird. Sometimes it looks cool.
If you've read other reviews about how dark things look in the viewfinder with an F8 lens, your experience should be a pleasant surprise: the lens has to be used in bright light in order not to use an impossibly high iso setting, and in sunlight or light overcast the image in the viewfinder is bright enough. Of course, if you're accustomed only to F2 lenses, what the Phoenix shows will look dark, at least at first. But the tradeoff is a really long telephoto, and you can buy a pretty good used car for what a really long Canon or Nikkor or even Sigma telephoto lens costs. And the Phoenix is a really light telephoto, and those other long, long lenses are truly heavy. So you can put the Phoenix in your camera bag or a big pocket and have it with you. You can take it to the zoo or the airfield or the outdoor game/race/event or the lake or on a ramble through the woods and not have to lug your tripod along.
But if you've always let your camera do the focussing, this lens requires a good deal of practice (but the truth is that shooting long telephoto shots with good AF still results in quite a few discarded images, so a manual-focus lens will only cut your "keeper" rate in half, or so, after you've practiced).
And then, the Phoenix 500-mm will not produce consistently first-rate images. With careful post-processing, it will give you some really good ones, and quite a few definitely satisfactory ones. If $100 is no big deal to you, and you want to try a really long lens, go for it. If $100 is a definitely big deal, then the cost of a better-quality lens is an even bigger one, and owning one of these is a far-future event. So you may want to get the Phoenix and save up for a better lens, and in the meantime learn to use a long telephoto, learn how to focus manually, and learn how to post-process images to real advantage. Learning those skills will be valuable. The Phoenix is fun to use. If you find you don't like long-telephoto photography, you can sell the lens and recoup a good deal of its cost. If you find you really love long-telephoto photography, you can look forward to getting a higher-quality lens and know your images will improve when you have one.
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(Auto exposure depends on the DSLR you have. With mine, the 500-mm Phoenix works fine when the exposure mode is set to Aperture priority, and exposures are consistently good. If you have to use manual exposure, it's not a big problem. Look at the chart on this page-- [...] --and change it by decreasing your shutter speed by two stops. Then on each outing take a test shot, look at it in your LCD, and make the adjustment you need. Easy.)
(The Phoenix reflex needs a lens shade. Get a cheap, collapsible rubber one; it will protect the front element, the lens cap will fit into it, and it will improve the contrast and saturation of your images.)

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Samyang Mirror Lens Multi-Coated 500mm F8.0. loc-RB Lens Section

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Opteka 500mm f/8 High Definition Telephoto Mirror Lens for Canon EOS 1D, 5D, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Rebel XT, XTi, XS, XSi, T1i, T2i, T3i & T3 Digital SLR Cameras Review

Opteka 500mm f/8 High Definition Telephoto Mirror Lens for Canon EOS 1D, 5D, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Rebel XT, XTi, XS, XSi, T1i, T2i, T3i and T3 Digital SLR Cameras
Average Reviews:

(More customer reviews)
The Skinny:
This lens is cheap. It is well built, feels smooth, but is really a telescope adapted to a camera. This is BAD JUJU (With a twist, read on!)
The Long:
When I first opened the box I was really impressed by the build quality. The machining of the barrel was perfect, as was the paint job. The objective lens was beautiful, and the secondary mirror mounting element was perfectly centered and machined. Everything reeked of professionalism and excellent quality control. The second thing to strike me is that the thing is really massive. It has an extremely large front element, and that strangeness is exacerbated by the secondary mirror mount smack dab in the middle. Upon investigating further I discovered 3 tiny screw in filters that were a .2 and .6 neutral density with a Skylight filter (color warming) These tiny filters screw into the back of the lens where it mounts to the camera, which can make it a real pain if you choose to change or remove one because you have to take off the T adapter first in order fit your fingers in there.
Why all these talk of primary and secondary mirrors? This lens is a Cassegrain reflector telescope. The light enters the front where it is bounced off a concave primary mirror at the rear to a secondary convex mirror at the front, which then travels through the hole in the center of the primary mirror in the rear into the cameras mirror box. Sounds fantastic right? Depends on your application. This configuration yields an incredibly small depth of field when dealing with things inside the hyperfocal distance. Basically anything inside the "infinity" setting has a small depth of field. Were talking almost macro small. 1 to 3 inches maximum. Very depressing unless you consider its true design, a telescope. More on that later.
My first "wildlife" trial shots were taken on a nice steady tripod with the 2 second shutter delay on. I consistently got blurred images due to "Mirror Slap" (The vibration of the mirror raising to expose the shutter) and this was only alleviated by using the mirror lock up and Live View, which is a pain for shooting wildlife to say the least. Secondly the tiny depth of field ruined all shots as the farther part of the subject rapidly blurred in a very unpleasant manner. So wildlife and sports photography are out for this lens.
However considering this lenses telescope construction prompted me to wait for nightfall and try taking some astronomical photos. I was incredibly pleased! At 500mm the moon fills most of the frame, and being beyond the hyperfocal distance the entire thing stayed crisp and sharp, again provided I used the mirror lock up.
Pros: Cheap, Well Constructed, Lightweight for 500mm, Short for 500mm
Cons: Limited Uses, f/8, Tripod (Must), Cable Release (Optional)
Notes: I would give it 2 stars were it not for its incredible build quality. I wish all my lenses were built to this standard!

Click Here to see more reviews about: Opteka 500mm f/8 High Definition Telephoto Mirror Lens for Canon EOS 1D, 5D, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Rebel XT, XTi, XS, XSi, T1i, T2i, T3i & T3 Digital SLR Cameras

The Opteka manual focus mirror lens is incredibly compact and lightweight. Using an advanced reflex design, this is a mirror lens that is ideally suited for wildlife and sports photography. It has a fixed aperture of f8. It comes complete with a soft pouch and three (3) rear mounted, 30.5mm filters, (ND-2X, ND-4X & Skylight). Opteka mirror lenses incorporates advanced computer designed optics and the latest in multi-coating techniques.รก The process of multi-coating assures virtually flare free photographs even under adverse lighting conditions resulting in crisp high contrast pictures with full color fidelity.SpecificationsFilter Size: 72mm front, 30.5mm rearf/Stop Range: f/8.0 (fixed) Minimum Focus Distance: 5.6' (1.7 m)Magnification: 1:3Angle of View: 5°Groups/Elements: 6/7Length: 3.4" (8.6 cm)Maximum Diameter: 3.0" (7.6 cm)Weight: 0.79 lb (360 g)Included Items~ Opteka 500mm f/8 Telephoto Mirror Lens~ 3 Filters (Skylight, Nd 2x, Nd 4x)~ T-Mount Lens Adapter~ Lens Caps~ Lens Pouch~ 10 Year Warranty

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Click here for more information about Opteka 500mm f/8 High Definition Telephoto Mirror Lens for Canon EOS 1D, 5D, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Rebel XT, XTi, XS, XSi, T1i, T2i, T3i & T3 Digital SLR Cameras