What Lenses Auto Focus

12 years 11 months ago #2749 by motorcross
I bought a Tamron 200-500 f5.6-6.3 the auto focus would not ever lock. So I returned the lens and faulty and got another one, but the second one did the same thing. When I went to return the lens for the second time there was a new salesman and he said that nikon and canon told him that lenses that are higher than f5.6 will auto focus. Is this the right information?


,
12 years 11 months ago #3297 by Dutch
I do not think this is the correct information because not all lenses have integrated auto focus.


,
12 years 11 months ago #4252 by Screamin Scott
What the rep was saying is that the AF detection system will hunt for focus with lenses that are F5.6 or slower. You may onlyget focus under extremely bright conditions, but that would limit it's usability....That is an inherent limitation with slow lenses (that & dim viewfinders as well)

Scott Ditzel Photography

www.flickr.com/photos/screaminscott/

Photo Comments
,
12 years 11 months ago #4324 by Nod
Screamin Scott is exactly right, when you get over f5.6, it has to be pretty bright out to get auto focus. But with a 500mm lens you should be manual focusing anyway. At that distance the camera is having a heck of a time to figure out what your metering on. In addition to that, you should be using a tripod (or some sort of stabilization) and it helps if you keep your shutter speed at least 500/sec or higher.


,

817.3K

241K

  • Facebook

    817,251 / Likes

  • Twitter

    241,000 / Followers

  • Google+

    1,620,816 / Followers

Latest Reviews

After starting the EOS R lineup of mirrorless cameras, Canon has expanded its offerings into APS-C territory. Which Canon APS-C camera is for you? Let’s find out!

Aug 22, 2023

In the Sony a7R V vs a7 IV, there is no doubt that both cameras are well equipped and provide excellent performance. But which is best for imaging? For video? Find out here!

Aug 21, 2023

In this FujiFilm X-T5 review, you’ll learn the ins and outs of this high-quality APS-C, including its basic specs and features, as well as a few lenses that work well with it!

Aug 08, 2023

The Panasonic GX8 is a micro four thirds interchangeable lens camera that came out in 2015. Is it still worth it in 2023? Get all the details in this comprehensive review!

Aug 07, 2023
Get 600+ Pro photo lessons for $1

Latest Articles

With this list of gifts for photographers under $500, you'll find all sorts of awesome ideas to get for your loved ones (or yourself) this holiday season.

Sep 20, 2023

Starting a photography business is one thing. Building a successful photography business that performs well over time is another. Get some tips on starting your business here!

Sep 20, 2023

Printing photos online makes getting high-quality prints so much easier. However, you need to partner with the right company to get the best results. Use this guide to learn what to look for!

Sep 18, 2023

Not every photography or videography situation warrants a tripod. In some cases, a camera monopod will do the trick. Use this guide to learn what to look for when shopping for monopods.

Sep 18, 2023

Searching for the best cheap full frame camera is pretty easy these days, as you can find high-quality used examples on platforms like MPB, which has an extensive inventory.

Sep 18, 2023

A photo print doesn’t have to be on paper. Instead, you can choose many other substrates like acrylic, canvas, or metal. The question is, which one is best for your images?

Sep 12, 2023

Part of running a successful business is building relationships with photography clients who keep coming back over and over for your services. Use this guide to learn how to do that!

Sep 12, 2023

Though monochrome photography is often thought of as black and white, this isn’t always the case. Some monochrome images use different tones of the same color.

Sep 12, 2023