Question about Quantaray 50mm f/2.8 AF Tech-10 for Canon EOS

2 Answers

Quantaray tech-10 24mm f2.8

I just bought this lense at ritz; been reading about the quantaray lenses and figured out that they are made for ritz.
the lense I bought:
the tag on the box said tech-10 24mm f2.8
the box said quantaray version 5 24mm 1:28 autofocus
I paid ... $81.21
the question: will this work with my new sony a-100??

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer
Re: quantaray tech-10 24mm f2.8

I work for Ritz and just fixed this issue for a customer. The lens may not be fully seated into the mount and the contacts are not in alignment so there is no communication between the camera and the lens. Try turning the lens a bit more... gently... towards the locking position, you will here a click from the release button coming up all the way and the lens should start to work just fine. 

Posted on Oct 18, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer
Re: quantaray tech-10 24mm f2.8

Yes, I have this lens and it works just fine with Sony alpha A100

Posted on Aug 18, 2008

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

Why does the camera say error 99 when i put lense on? camera works fine with other lense. we have a cannon 30d.

The Quantaray lens is not compatible electronic wise with your Canon. It is indeed made to fit Canon, but the lens is a bit outdated compared to the relatively new Canon.

Quantaray lenses were sold by Ritz Camera (also Wolf Camera). You would want to take it in to the and see if it can be sent out and re-chiped, which will allow it to work with the newer Canon cameras.

Not all lenses can be re-chiped. You may just have to purchase a new lens.

Sep 09, 2010 | Quantaray Tech-10 70-300mm f/4.0-5.6 Lens...

1 Answer

Where do I send my quantaray 70-300mm for repair

You may have two options.
First, contact the place where you bought the lens from. Quantaray is mainly a Ritz Cameras brand.
Secondly, you can use third party repair shops.
I purchase some of my lenses from KEH. []. They have a repair shop for cameras and lenses.
Attached is their FAQ site.

Hope this helps.

Apr 01, 2010 | Quantaray 100-300mm F4.5-6.7 Zoom Lens for...

1 Answer

The Quantaray 70-300mm lens

Only if you get the version with the built-in autofocus motor. The D3000 lacks a mechanical AF coupling so AF lenses which need to be driven by a motor in the camera body will require manual focussing.

Either way, you're far better manually focussing the Quantaray/Tamron 70-300mm: the AF performance is very slow, very noisy and hunts around a lot to achieve focus.

Although the Quantaray and Tamron versions are identical lenses, if you have to buy this low-quality budget model then go for the Tamron: it's absolutely no better lens quality (and usually the same price), but the manufacturer's warranty from Tamron is much better than Ritz and is internationally valid. If you resell the lens then the Tamron will have some value (not much though) and the Quantaray will be near worthless as it's not so widely known, and has a poor reputation amongst those familiar with the brand.

"Cheap" isn't always the same as "good value"...

Mar 06, 2010 | Quantaray Tech-10 70-300mm f/4.0-5.6 Lens...

1 Answer

My lenses not working with my new Canon Rebel

Check with your local Ritz Camera store, or find Ritz online. In the past they've been updating the chip in the lens to work with digital cameras at no, or small charge ( Quantaray is a Ritz house brand ).

Dec 31, 2008 | Quantaray Tech-10 70-300mm f/4.0-5.6 Lens...

1 Answer

I have a Quantaray 19-35mm lense and there are three screws that hold the assembly that attaches the lense to the camera. 1 of those 3 screws has come lose and fell out. Any idea where I can get a new...

Quantaray lenses are private label lenses made by Sigma for Ritz Camera. For service contact Ritz Cameras or your nearest large camera store. Most large camera stores have a repair department that should be able to supply the screw for your lens.

Dec 18, 2008 | Quantaray 19-35mm F3.5-4.5 for Canon

1 Answer


Quantaray brand lenses are made by Sigma, branded as Quantaray and sold thru Ritz Cameras. Here is this lens on Sigma's site. Or it may be this lens. (Sigma makes 2 70-300 lenses with different lens coatings.)

Unfortunately, neither Sigma nor Ritz makes their lens manuals available online as pdfs, unlike Canon and other major camera and lens manufacturers. Sigma's downloads are limited to just a few of their cameras, and to the brochure for their lenses.

You will need to get your hands on a paper copy of the user manual for this lens. I suggest you go to a Ritz Camera store in person, at a time when they aren't busy (when they first open is usually a slow time). First, ask for a UV or polarizing filter for this lens (or a similar item you might need) - this makes you a "paying customer" so they will be more likely to help you with your next request. Then ask to see the lens, and the owner's manual. Then ask if they can photocopy the manual for you. They are more likely to help if you are asking them to do a favor for you when you are also buying something (the filter) than if you weren't buying anything.

If they aren't willing to photocopy the owner's manual, you can also consider purchasing the lens "as a gift", photocopy the manual yourself, and then after 12/25 return it "because the recipeint already has one". Check their return policy to make sure you can get a refund, not just store credit.

Dec 13, 2008 | Quantaray AF 70-300mm f/4.0-5.6 High Speed...

1 Answer

Aperture wont adjust on my canon rebel xt

If it's an older lens, for EOS film cameras, Quantaray might upgrade it free - contact your local Ritz Camera store ( it's imported by Ritz ) or find a repair center for Quantaray online.

Nov 18, 2008 | Quantaray AF 70-300mm f/4.0-5.6 High Speed...

1 Answer


Quantaray is a private label lens sold thru Ritz Cameras. Contact Ritz for service on this lens.

Oct 28, 2008 | Quantaray AF 70-300mm f/4.0-5.6 High Speed...

1 Answer

Quantaray 28-200 1:3.5-5.6

You can get parts from Ritz Camera - send specifics to email CSmith@RITZCAMERA.COM

Jul 06, 2008 | Quantaray 50mm f/2.8 AF Tech-10 for Canon...

1 Answer

It doesn't work with my digital camara

Some of the early Quantaray lenses, designed for the EOS film cameras, need to be upgraded by Quantaray. Contact your local Ritz Camera, or go to their support page online to find out if an upgrade chip is available for your particular lens, so it can be used with a digital EOS

Nov 07, 2007 | Quantaray 50mm f/2.8 AF Tech-10 for Canon...

Not finding what you are looking for?
Quantaray 50mm f/2.8 AF Tech-10 for Canon EOS Logo

887 people viewed this question

Ask a Question

Usually answered in minutes!

Top Quantaray Camera Lenses Experts


Level 3 Expert

94039 Answers


Level 3 Expert

3283 Answers


Level 2 Expert

371 Answers

Are you a Quantaray Camera Lens Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides