Do I get a Sigma 18-35mm f1.8 or a Sigma/Tamron 17-50mm f2.8 OS/VC for general shooting?

Do I get a Sigma 18-35mm f1.8 or a Sigma/Tamron 17-50mm f2.8 OS/VC for general(mostly travel, landscapes, studio work and some video work) shooting. I will be using the lens at night and dark situations. I ll probably even use it for event/wedding photography/videography. I have a Nikon D7200 as well as a 50mm f1.8G and a 18-140mm f3.5-5.6 VR lens.

Will Raynox DCR 250 help me it all? If yes, how?

I have Nikon D5300. Lenses I have are Nikkor 18-55, Tamron 16-300 and Nikkor 105 micro f2.8.

I'm interested in macro. So should I buy this Raynox? Which lens (among the 3 I mentioned) should I use behind Raynox? Will autofocus work?

Will I have a problem with 50mm D lens mounted on Nikon D3400?

I'm a beginner with photography and started only earlier this year. Like most, I started with the kit lens that came with the camera body.

Recently I've been interested in buying a prime lens. The most affordable one I've been seeing in malls is the 50mm Nikkor prime lens with f/1.8. My problem is that it's a D lens and I've read that D lens won't work with the D3400 because the body has no auto focusing motor or something like that.

Is this the only problem that I will encounter? I read that I could still shoot in manual mode, which is fine because that's the only mode I shoot with. I would just like to clarify if this is the only thing I should be worried about. I'm still unfamiliar with the 50mm lens body as of now but I'll get through that once I play with it. Any input is appreciated.

I need a new 300+mm lens but still in high school so still on budget under $300?

At the moment I shoot with my Nikon d7100 but i'm using an very old tamron af 70-300mm f 4-5.6 ld tele-macro and I get a purple haze over whites sometimes and the lens is not very sharp at all. I have been doing some wildlife photography lately mainly a kingshisher, but I'm just not happy with the quality of the images. I would like something over 300mm or just a prime 300mm but the cash starts to raze with those big tele-photo lenes. Any suggestions?

Nikon Nikkor Fish eye lenses?

What are some older manual focus / AI fish eye lenses?

Also, what's the most affordable fish eye [non-DX]

Willing to look at off brand lenses too

Added (1). will the Opteka 6.5mm Fisheye Lens work on a full frame DSLR or will there be a big vignette?

I'm a bit confused about the focal length thingy of DSLR lenses. Can you clarify a bit?

I'm looking to buy Nikkor 40mm 2.8 for jewelry photography but everyone keeps saying that focal length is too less which makes minimum focus distance less too. So if I take jewelry pics and I'm not close to the minimum focus distance but a little further from the minimum focus distance, will it effect the pictures quality? I will be using the focus stacking technique.

If funds weren't an issue, would you buy a Nikkor 50mm f/1.8G or f/1.4G?

If funds weren't an issue, would you buy a Nikkor 50mm f/1.8G or f/1.4G? - 1

Nikon d750 with tamron 24-70 2.8g Samples

If you use nikon d750 with tamron 24-70 2.8 g lens then can i get a sample of a non edited pic in jpeg format!

I'm looking for a good tripod that can carry my Nikon D7200 and Tamron 70-200mm F2.8 G2

Please consider an arca swiss plate from my 70-200. Also, if you have other brands, let me know (I hope it's not too expensive)

1. Fotopro C5C
2. Manfrotto BeFree Live

Potrait lens for crop sensor (nikon) camera?

I'm currently using a d5300 and would like to be able to take better potraits.

Currently i own the nikon 35mm 1.8 and the sigma 17-50 2.8

I would like to purchase a lens that could give me more shallow depth of field that the lens i currently own.

I'm leaning towards the 70-200 2.8 from tamron for verstility but also interested in the sigma 85mm 1.4 or 50mm 1.4

Would the 70-200 be good enough to give me a shallow depth of field for outdoor FULL BODY potrait? Or would i need a 85mm/50mm 1.4.