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Tamron AF 90mm f/2.8 Di SP A/M 1:1 Macro Lens for Pentax Digital SLR Cameras
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- This light super performance (SP) macro-lens offers a 1:1 magnification ratio and pin-sharp images
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|Item Dimensions||7.15 x 7.15 x 9.7 cm||6.5 x 8.1 x 6.5 cm||6.3 x 11.71 x 7.3 cm||10.41 x 15.75 x 10.41 cm||6.3 x 4.5 x 6.3 cm||7.8 x 12.7 x 7.8 cm|
|Item Weight||400 grams||340 grams||0.6 kg||265 grams||124 grams||1.13 kg|
|Max Aperture||f/2.8||2.8||81.28 cm||2.8||2.4||f/2.8|
|Max Focal Length||90 mm||100 mm||90||50 mm||35 mm||105 mm|
|Min Aperture||2.8||2.8||32 inches||32||22||22|
|Min Focal Length||90 mm||100 mm||90||50 mm||35 mm||105 mm|
Style Name: Pentax
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The legendary 90mm F2.8 has been available in different improved versions for over 30 years, and therefore stands in a long macro tradition in the super performance series. This light super performance (SP)* macro-lens offers a 1:1 magnification ratio and pin-sharp images with beautifully blurred backgrounds that make your subject stand out. The Di version was adapted to the demands of digital SLR cameras and characterized by a new multi-coating with which the stray-light behaviour of the lens was optimized. The Tamron 90mm is often called the "portrait macro", because the focal length is also ideally suited for portraits. The new version can be also be used on full frame or 35mm cameras.
*SP (Super Performance) - This lens belongs to the Super performance (SP) class of Tamron lenses distinguished by ultra high optical and mechanical quality.
Equally at home on APS-C DSLRs, rendering a picture angle equivalent of the 140mm lens on a full-frame DSLR or 35mm SLR camera, photographers appreciate the resulting increase in front element-to-subject distance and close-up photography. In addition, this 135mm-like picture angle is well-suited for environmental portraiture. Extraordinary sharpness, striking contrast and a remarkable absence of distortion combine to produce images of exceptional calibre.
9 Diaphragm Blades
The number of diaphragm blades affects the "shape" of the blur in out-of-focus areas of the image. This is more important in portraiture, where the aperture setting is often wide open, and macro photography, where the high magnification results in blurred background and foreground even at narrow apertures. When backgrounds are soft and blurred, not only is the effect very pleasing and "photographic", but it also serves to isolate the subject from a distracting background, providing a professional-looking image. A high number of blades provide a rounder shape to the aperture, which in turn makes the shape of the blur more circular and much more natural.
Super Performance (SP)
Tamron SP (Super Performance) series is a line of ultra-high-performance lenses designed and manufactured to the exacting specifications demanded by professionals and others who require the highest possible image quality. In creating SP lenses Tamron’s optical designers put their foremost priority on achieving superior performance parameters—they are all designed to a higher standard with little regard for cost constraints. As a result, Tamron lenses bearing the SP designation feature impressive and innovative designs that have established an enviable reputation for excellence among those knowledgeable photographers that demand the very best.
One major difference between digital and film cameras is how internal reflections may occur and to what extent. These internal reflections can cause unwanted flare or ghosting on the final image. In a film camera, internal reflections can be created inside the mirror box of the camera or from light reflecting off the film surface itself. However in a digital camera, the almost mirror-like surfaces of CCD and CMOS sensors make this much more of a challenge. Di lenses offer new anti-reflection countermeasures that are essential in lenses designed for use with digital cameras. The SP AF90mm Di features an improved coating technology that reduces the problematic reflections to the absolute minimum.
As a medium telephoto focal length, 90mm is particularly useful as a portrait macro lens when used with a film camera. When used on a digital SLR camera with a smaller image sensor, the lens provides a focal length equivalent to that of 140mm, so it can be used conveniently as a telephoto macro lens.
Auto-focus/Manual-focus (AF/MF) Switch Mechanism
The ability to switch quickly between auto-focus (AF) and manual-focus (MF) is a great asset in many types of shooting, especially sports and nature photography. This is easily accomplished with Tamron’s ingenious AF/MF system. By simply sliding the focus ring back and forth between the two positions you can select either the AF or MF focusing position. In manual-focus mode Tamron lenses provide smooth, precise manual focusing by turning their wide, well-textured focusing rings.
Top customer reviews
This would probably rate as one of the most useful, and pleasing lenses I've ever used over quite a long period of time.
As well as an excellent macro lens with 1:1 magnification, on a 1.5x crop sensor you get an extremely useful candid focal length of 135mm...almost perfect for street/candid shooting. As a dual purpose lens this is simply a stunning offering from Tamron at a very respectable price.
Pictures are sharp and show excellent contrast at f2.8 across the frame, with a wonderful blur effect for portrait shooting the Tamron has rightly earned a reputation second to none for this type of photography. I'll provide a summary of pros and cons
+ Good build (plastic but decent plastic) with a nice grip for focus and metal mount. This is just fine for the price
+ Superb optics even wide open, with a 9 blade aperture for smooth out of focus rendition. Stunningly sharp stopped down
+ Very useful focal length for macro AND candid/portrait shooting
+ Focus limit switch, very handy for non macro work to speed up the AF a bit
+ The front element is well into the body of the lens which means you are not likely to use the hood much
+ Lens is very light and easy to carry around without bogging you down
+ 55mm is a good filter size for Minolta/Sony users (common size)
+ Very smooth manual focus (as expected for a macro)
+ It's a "full frame lens" so no problems if you get a FF body later on or shoot some 35mm film
- Can suffer from some CA issues more so wide open (varies from copy to copy) My current copy is one of the bestter ones I have used, can be an issue with strong highlights in an image (CA around the highlight edges)
- Focus is not fast (it's a macro) focus limiter helps a bit here, screw drive versions tend to be faster (depending on the body used)
- Lens extends with focus
- Due to the recessed lens elements you are closer to the subject for 1:1 macro than you might expect (but not as close as some of the short focal length macro lenses)
Just a quick note that the "one touch" for manual focus works only on the Nikon/Canon versions (pull it towards you to MF)
As is normal for a macro lens at closer focus distances the lens speed drops (to around f5.6 at full macro) this is normal for a macro lens.
The Pentax version I had did have an aperture ring, other versions do not.
The in lens micro motor versions of this lens (Canon/Nikon) are in my view not as good as the screw drive versions (Pentax/Sony) the motor is not that quiet (it's ok but not USM) focus is acceptable speed wise but not as fast as the other versions in my use of this lens.
As an added "bonus" users with in body AS/SR/IS will get a free ticket here a stabilised 90mm f2.8 lens which is really very useful for lower light situations. Tamron have a new VC version with a faster quieter in lens motor and sealing with Tamron's good VC stabilisation too, but with this one around it's a big win for A mount users and K mount ones who won't benefit from a VC 90mm Macro (Tamron don't include VC on these mounts) The sealing and better AF motor might swing it for Canon and Nikon users though.
Very hard to find fault, the words "classic" are too often banded around for lenses. This one delivers superb images, and wonderful portraits with smooth creamy blur.
You have quite a few choices for Macro lenses across all the mounts and various focal lengths from 30/40/50/100/105mm and more. The 90mm comes into it's own on the 1.5x crop sensors giving you a superb 135mm "classic" focal length. For users who have normal 35/50mm prime lenses this makes more sense than picking up a macro in that focal range. One of a handful of lenses that I cannot recommend enough this is one of the best I've used, the decent price simply adds to the appeal. There are quite a few reviews around for this lens, just about all put the Tamron as good if not better optics wise than most of the rivals out there including the original makers macro lenses. Enough said..this delivers and you won't want to be without it after you fall for it's charms.
Stunning Image Quality.
Focus ring is nice and large so you can easily adjust it.
The lens focuses quickly when set to 1m+
For macro work you are better off using manual focus as auto it can seek backwards and forwards.
3 distance switches work well.
Very quiet focus.
I have been using this lens on the Nikon D800.
Mainly for portrait and food photography.
90mm is a really good size to have in your collection of lenses for sure.
For close up macro work this is one awesome piece of kit.
Tried it out on a spider. The subject was about 1cm long, went in nice and close, could see his eyes !
Detail in this lens is mind blowing.
VC is good if your are using it for video related work.
This is for sure the best lens I have ever used.
Images are super sharp and detailed.
Honestly cant find a thing wrong with this lens.
If you want a fantastic macro/portrait lens this is it.
Tried out other macro lenses (Nikon/Sigma) before buying and this beats them all by a big margin !
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