Camera Labs

I have a tight budget but I need lens from third party can anyone suggest me please

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Mongkol

You're going to need to provide more details than that my friend.

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Jason

Just a new guy learning his way

Film: Olympus XA2
Digital: Nikon D3100 w/SB-600: , Nikkor 35mm f/1.8G, Tokina 12-24MM F4 Pro II

My Flickr: http://www.flickr.com/photos/jkmcdonald/

My Blog: http://jmcdonaldphotography.tumblr.com/

I have a budget around 500 - 700 $ my camera is Canon 500D sorry I forgot to put in a detail .

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Mongkol

tokina 11-16mm F/2.8 is perfect

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Gear: Nikon D80, 18-105mm, 35mm F/1.8, 85mm F/1.8, SB-600
Visit my work here

I will echo Razvan, based on the research I did, not actually owning one. I decided to buy the Canon EF-S 10-22mm lens, but came VERY close to buying the 11-16mm Tokina, instead. I own a most excellent 100mm Macro made by Tokina, and believe their lenses to be very good.

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Canon 7D/5D/40D/1D2N; Nikon F6, FM3A, & Coolpix A; Canon 40mm Pancake, 135L, 50L, 35L, pre-II 50mm 1.8, 100mm 2.8L Macro, 10-22mm EF-S, 28-135 EF, 400mm 5.6L; Nikkor 50mm 1.2 AI-S, 50mm 1.4G, 50mm 1.8D, 16mm 2.8D Fisheye, 180mm 2.8D, 100-300mm 5.6 AI-S; Tokina 17mm & 100mm 2.8 Macro

Tokina 11-16mm F/2.8 here, i have no desire to look for anything else its the nuts.
Just watch for the flares and the sun stars might be a bit OTT, buts if your careful you get great results with it.

If you are on a budget, then get the older Sigma 10-20mm f/4-5.6 EX DC HSM. This doesn't take in as much light as the Tokina, but if you are doing landscapes, then you won't need it. Also, it goes wider, and zooms in more, than the Tokina.

Sigma has a newer f/3.5 version of this lens, but it is more expensive.

The only reason I would advise the Tokina is if you need more light intake.

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Canon 5DIII, Rebel XTi/400D
Canon EF 16-35mm f/2.8L II, 24-105mm f/4L, 50mm f/1.4, 70-300mm f/4-5.6 DO, 85mm f/1.8
Sigma 150mm F2.8 EX Macro
Sigma 10-20mm f/4-5.6 EX, Canon EF-S 18-55mm f/3.5-5.6 II
Canon 430EX II
Opteka 13mm, 21mm, and 31mm extension tubes
Vivitar 50mm f/1.8 for OM System

Here's my wide-comparison from some time ago.
haven't tested the latest lenses, but today I think I'd still go for the Sigma 10-20mm - and look to get a good copy.

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Thomas (beware: Nikon-fanboy and moderator!) My Lens Reviews, My Pictures, My Photography Blog
D800+assorted lenses

If AF is'nt important to you then I'd recommend a manual focus prime as they are generally sharper than zooms.
I dont think you actually mentioned how wide you want to go but 17mm primes go very cheap. I picked a Tokina 17mm f3.5 RMC up for about $15. The Tamron SP 17mm f3.5 is better but it cost me about $180.
Both are FF lenses.
If you want to go wider than 17mm on the cheap but dont want a fish-eye then the Sigma 14mm f3.5 is probably about as wide as it gets for a cheap manual focus FF rectalinear prime. Got mine for about $100. I really like 14mm on crop format as it gives the equivalent FOV as a 24mm lens on FF.
Here are some Sigma 14mm samples...All wide open and handheld:

http://www.flickr.com/photos/alfbeharie/5601667346
http://www.flickr.com/photos/alfbeharie/5581172080
http://www.flickr.com/photos/alfbeharie/5572406023
http://www.flickr.com/photos/alfbeharie/5572406817
http://www.flickr.com/photos/alfbeharie/5572998550
http://www.flickr.com/photos/alfbeharie/5572408339

If you want to go go wider than that on crop format, without resorting to a fish-eye lens, then you will need a modern AF zoom.
The Sigma AF 8-16mm EX is currently the widest rectaliner zoom on the market for crop format and its an excellent lens...But perhaps a bit over your budget in the price department.
The Sigma 10-20mm f3.5, again for crop format, is also excellent but again perhaps a bit too pricey.
If you want a really wide fish-eye lens for crop format then again, its Sigma that offer the widest available. The Sigma 4.5mm EX is currently the widest fish-eye lens with AF on the market.