Most of you have been thrilled by the quality of the Macro Lens that you’ve purchased.
I’ve seen some really good pictures from you guys. Thank you for sharing and keep up the good work
I want to share something with you and this question comes from Karen, who just purchased a Tamron 90mm Macro yesterday:
“I bought a Tamron 90mm f/2.8 Macro. I love it, but it only goes to f/3.2. What am I doing wrong? Is it not compatible with my Nikon D90? It does the same thing on my Dad’s Nikon D5000.”
If you experienced the same situation as Karen, fear not. It is perfectly normal.
Here’s the explanation:
The lens is perfectly normal and Karen did nothing wrong. And it’s not her cameras problem as well.
In fact, this happens to ALL macro lenses, not just her lens or Tamron lens.
On any macro lens, the aperture will decrease as you focus closer on your subject. The Tamron, automatically calculates and determine the effective aperture on your camera.
This happens to any Macro lens, whether it’s Canon, Nikon (Micro-Nikkor), Pentax and Sony. They all have to obey the same law of physics.
An easy to way to understand this is that depth of field will be very shallow when you shoot macro. Therefore, in order for the lens and camera to somewhat maintain part of the picture in focus, it has to calculate the most optimal aperture to do this and it is not the largest aperture.
Hope this clarifies any confusion regarding Macro lens.
If you’re not bothered by this problem, keep on shooting good pictures!
Cheers,
Luke
P.S I’m giving a free Photography Tips via email, you can sign up for it here.
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Luke Darma
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