EF-S 17-85mm in Ikelite Flat Port
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jdcpa
Contributor
I am not aware of any flat port that allows you to zoom that lens. Somehow I thought the lens diameter would not allow the normal zoom operation, but I could be wrong.
You would not be able to use anything but the long end anyway, literally making it a fixed lens.
The 17-85 is not classified as a macro lens.
You would not be able to use anything but the long end anyway, literally making it a fixed lens.
The 17-85 is not classified as a macro lens.
bvanant
Contributor
If you plan on using it for anything wider than say 35 mm you will need the dome for anything remotely sharp. AFAIK that lens has a magnification of 1:5 (not really macro) and a closest focusing distance of 35 cm. I know canon says macro on the side but that just means you can get close to the subject nothing like a bespoke macro lens.
Bill
Bill
Thanks for the replies!
I have been using a 18-55mm and have found that I mostly work in the 40-55mm range. For that range my flat port has given me sharper pictures than the dome. I expect that I will be using the new lens in a similar range, say 40mm and up. I know that wide angle quality will be compromised and I am willing to make that trade-off.
Jdcpa, it is true that the lens diameter will not allow you to use the ring with the plastic gear in the housing itself, but I thought the focus knob on the port can do that instead.
I have been using a 18-55mm and have found that I mostly work in the 40-55mm range. For that range my flat port has given me sharper pictures than the dome. I expect that I will be using the new lens in a similar range, say 40mm and up. I know that wide angle quality will be compromised and I am willing to make that trade-off.
Jdcpa, it is true that the lens diameter will not allow you to use the ring with the plastic gear in the housing itself, but I thought the focus knob on the port can do that instead.
jdcpa
Contributor
I don't know that for certain. If I get a chance today, I will give it a try.
bvanant
Contributor
If you are not using a diopter on the lens in the dome it will appear a bit less sharp but if you want to get the most from the wide end, use the dome and a +2 diopter.
Bill
Bill
