ahansen60
TPF Noob!
- Joined
- Nov 8, 2012
- Messages
- 7
- Reaction score
- 0
- Location
- Ogden, UT
- Can others edit my Photos
- Photos NOT OK to edit
Hey I have a Nikon D5100 and have been using the 55-300 mm DX Nikkor lens for my telephoto shots. I wanted to upgrade to a telephoto that was at least twice as powerful as my current lens. So my logic was that I could either buy another DX lens that goes out to 600 mm, or buy an FX (full frame) lens that goes out to 400 mm for the same amount of reach as the DX lens. Is this logic sound? I realize that the focal length will always be what it says on the lens, but if you have a 400 mm FX lens on a DX (crop sensor) camera won't the equivalent field of view be like a 600 mm DX lens? The reason I ask is because I just bought a new telephoto lens thinking that it would give me twice as much reach as my old one, and instead it is only just slightly better. I bought the Sigma 120-400 mm full frame lens and thought that it would give me twice as much reach as my Nikkor 55-300 mm DX but it doesn't. Not even close. Why is that?