Give your scope solid support using the Barska Low Weaver-Style Rings for 30mm maintubes. Each ring is manufactured from anodized aluminum and has two cap screws. For improved grip on the maintube of your scope, each ring also has two internal pads.

For Scopes with 30mm Maintubes    Fits Picatinny/Weaver Bases    Internal Pads Improve Grip on Tubes    Aluminum Construction

Related Questions and Answers

Q: 1. '' a 3.7 minimum focusing distance, and a 0.6 minimum working distance. What does that mean?

A: Minimum Working Distance = the closest you can get the front element of the lens to your subject and still have the lens able to obtain focus. Minimum Focusing Distance = the shortest distance the lens will focus, measured from the sensor inside the camera, since that's where the image is focused. Since that distance is very close to the length of the lens, the minimum working distance is approximately the minimum focusing distance minus the length of the lens.

Q: 2. Is this the 30mm f/1.4 DC HSM A model?

A: The Sigma 30mm f/1.4 DC HSM Lens for Canon DSLR Cameras is part of the Sigma Art Series of lenses.

Q: 3. Is this lens compatible with Sony Nex-5N? Thanks

A: Unfortunately, no; the Sigma 30mm f/1.4 DC HSM Art Lens for Sony is designed for use on the Sony A-mount/Minolta MAXXUM lens mount, not the Sony E-mount used on the Sony Alpha NEX-5N Digital Camera. The Sigma 30mm f/1.4 DC DN Contemporary Lens for Sony E, B&H # SI3014DCDNS, and the more economical Sigma 30mm f/2.8 DN Lens for Sony E-mount Cameras (Black), B&H # SI3028DNSEB, would be the options that are directly compatible with the Sony E-mount used on the Sony Alpha NEX-5N Digital Camera. The Sigma 30mm f/1.4 DC HSM Art Lens for Sony listed above would require an adapter to connect tto the Sony Alpha NEX-5N Digital Camera.

Q: 4. Weather proofing?

A: There is no weatherproofing on this model. You have to go to the M.ZUIKO ED 60MM F2.8 MACRO to get some splash & dust protection (actually, it costs just 50$ more than the 30MM, I have it too and I use it a lot), or the M.ZUIKO ED 12-50MM F3.5-6.3 EZ

Q: 5. The autofocus work with D5300?

A: Thank you for your interest in Sigma products. The auto focus will work with the Nikon D5300.

Q: 6. Will lens perform general photography,like 4/3 35mm macro f/3.5?

A: Yes. As a backpacker, I carry just the macro and use it for landscape and general photography in addition to macro work.

Q: 7. Can this lens be used with the Canon 90D?

A: You would be able to use this lens with the Canon 90D.

Q: 8. Is this good for street photography? I'm looking at a 25mm but this looks good as well, is 30mm too narrow?

A: Yes, it good and very sharp

Q: 9. I understand 1:1 but what does 1:1.25 mean is that less than 1:1 or more than 1:1?

A: It magnifies to more that 1:1, thus considerably more (25%) than life size. The only problem with that is, that at such magnification the object is .6 of an inch from the front element and very difficult to light without specialized flash. It also is a poor choice for anything alive, even if chilled to restrict movement. So one gets extra magnification over the Panasonic version, but one loses half a stop of speed at the same time.

Q: 10. Will the Sigma 30mm f/1.4 DC HSM Art Lens for Canon work with my Canon Rebel T3i?

A: Yes