Basic data
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Specification
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Review
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Ebay auctions and purchases
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Sigma DC C 17-70mm f/2.8-4 Macro OS HSM
This camera glass has a wide aperture range of f/2.8-4, which means it can let in a lot of light and provide a shallow depth of field. The lens elements are coated to reduce flare and ghosting, which can occur when shooting in bright light. The build quality is sturdy and durable, making it a good investment for photographers who need a reliable photographic lens. This lens has a good resolution, which means it can capture sharp and detailed images. Alternatives to this lens include other zoom lenses with similar focal lengths and aperture ranges. Overall, the Sigma DC C 17-70mm f/2.8-4 Macro OS HSM lens is a versatile and high-quality option for photographers who need a lens that can handle a variety of shooting situations.
with others. Is that correct?
Optical design
Full frame equivalent focal length is 25.5-105.0 mm. It is a ring-type ultrasonic motor designed to provide quick and silent focusing. Has 7 aperture blades, mid-grade lenses usually have this amount of blades. Having rounded blades provides out of focus circle shape closer to a circle. Thanks to the macro capabilities this lens can make tiny things look big.
Physical characteristics
With a lens filter diameter of 72 mm you are one step from the next standard filter size, buy step-up ring and bigger filter but you can chose from plenty options. 82 mm long, requires consideration if you want to carry in the camera bag. Weights 470 grams so plan ahead, carry only if really necessary.
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Samyang 10mm f/2.8 ED AS NCS CS
The Samyang 10mm f/2.8 ED AS NCS CS is a camera glass that has a wide-angle view with a bright aperture. It is manually focused and has a fisheye effect that can create unique photos. The lens has multiple elements and a coating to reduce lens flares and ghosting. It is built with good quality materials and has a high …
allphotolenses.com –
8.0 allphotolenses.com user rated as 4.67/5
Ebay.com –
Ebay.com rated as 4.86/5
lens-club.ru –
2 lens-club.ru user rated as 4.37/5
Ebay.com Aug 15, 2018 –
Perfect walk around, low light and portrait zoom lens for aps-c cameras The version I got is the Sigma 17-70 F/2.8-4 DC Macro HSM. It is not the OS (Optical Stabilzer) model. This particular version is in the Pentax K mount so OS was not needed anyways.
Since vetting the lens, I’ve put it through the ringer. Shot Portraits both with off camera flash and natural light wide open. Low light portraits wide open. Each situation resulted in near prime lens sharpness.
Astrophotography was a bit difficult because the lens can focus past infinity and the throw isn’t very long, so making micro adjustments is pretty hard to pull off. The flip side is this, once It’s dialed in, the contrast, saturation and color are amazing! The details really stand out. I was told by a number of my pro photog friends to grab the 17-50 2.8 since it’s a fixed aperture. I decided not to since if I want a shallow depth of field I can use the compression of the extra 20 mm in focal length for pretty much the same effect at F/4 as I would get with 50 mm at 2.8. Not to mention the extreme close focusing that the 17-70 allows is awesome! It’s not true 1:1 macro but with the proper post processing technique you can easily create 1:1 macros with this lens without loss of quality.
I highly recommend this lens if you’re looking for a high quality lens for travel, walk around, landscapes and portraits and/or you’d like an upgrade from the kit lens. Just keep in mind that the Sigma isn’t weather sealed.
Ebay.com Apr 10, 2017 –
good lens for the price the lens is hefty for its size. well-made, good fit and details.
the lens takes good pictures, and the zoom range is very handy.
the one drawback is that the lens does not let in enough light. i expected to be able to take pictures in lower light situations, but the lens struggles in this area. I realize that f2.8 is not a huge aperature, but i expected a bit more.
in mid to bright light situations, this lens rocks! i took pictures of the high school track meet, and all but the fastest feet and hands were well in focus and not blurred.
overall a good buy, and fairly versatile, except for low light.
Ebay.com Sep 06, 2017 –
Light Weight and Sharp Enough! A great alternative for crop sensors at an affordable price. Not tack sharp wide open but step down to 4.0 at the lower end and 5.6 at the high end and it is perfect. Bokeh is very good but not perfect. For the price you pay I think is is a great lens. For Macro, please buy a dedicated macro lens instead.
Ebay.com Jun 08, 2016 –
Amazing lens I bought the lens because I wanted a higher functioning and lower f-stop lens. This lens does that! I have kept it on my camera constantly since I purchased it (a month or so ago). I highly recommend it! For being a beginner, it was a great value that provides fantastic quality.
Ebay.com May 23, 2019 –
Awesome Lens I love this lens. Checked it with Reikan FoCal anti it has a consistent focus throughout the focal lengths. This one stays on my camera.