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??
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.
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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. [keh.com].
They have a repair shop for cameras and lenses.
Attached is their FAQ site. http://www.keh.com/repair-center.aspx
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.
Call Ritz Camera at 877-999-RITZ (7489). They "might" be able to assist you. Ritz's generic lenses are Quantaray made by Sigma. I don't know who makes the tripod. They are able to provide documentation for you, but I don't know if they will. Ritz has an online help form that you can fill out on their web site also
The little 'hooks' on the bottom of the legs 'snap' into each other to secure the legs together. Each leg has a 'hook snap' which clicks into place with the other legs. It is merely a way to secure the legs from flopping open. I bought the same tripod, a good solid piece of equipment. No instructions but its easy enough to figure out. Hope this helps.
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 ).
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.
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