TamiyaGuy
No longer a newbie, moving up!
- Joined
- Jun 25, 2007
- Messages
- 1,078
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- Location
- Chelmsford, UK
- Can others edit my Photos
- Photos OK to edit
I'm really into close up photography, so I thought the time was right for me to get a proper macro lens, rather than live with my 18-55 kit lens. I tried out the Nikon 105mm f/2.8 macro lens in a shop, and loved it... for the most part. However, I had 2 main problems with it:
1) The lens seemed to have trouble autofocusing sometimes. It would zoom to infinity, zoom back, and then just give up, even when there was ample light. I know you should manual focus in macro shots, but I'm not sure I have enough skill to do so.
2 (and this is the big one)) When focusing at a 1:1 reproduction ratio, the lens wasn't actually at f/2.8, actually more like f/4.8. If I focused on something 3 metres away, it was at 2.8, but it seems as though if it is marketed as an f/2.8 lens, then I'd better damn well get f/2.8!!!
Is there anything I can do to help stop these problems? And if there isn't, would someone mind telling me just why this happens? Thanks ever so much for the help.
~TamiyaGuy
1) The lens seemed to have trouble autofocusing sometimes. It would zoom to infinity, zoom back, and then just give up, even when there was ample light. I know you should manual focus in macro shots, but I'm not sure I have enough skill to do so.
2 (and this is the big one)) When focusing at a 1:1 reproduction ratio, the lens wasn't actually at f/2.8, actually more like f/4.8. If I focused on something 3 metres away, it was at 2.8, but it seems as though if it is marketed as an f/2.8 lens, then I'd better damn well get f/2.8!!!
Is there anything I can do to help stop these problems? And if there isn't, would someone mind telling me just why this happens? Thanks ever so much for the help.
~TamiyaGuy