Looking at a Sigma lens for Nikon (discontinued 100-300 F4) that is a "DG" lens, denoting digitally optimized. Why then does it have an aperture ring? This does not appear to be the case on the Canon mount version. Thanks for filling me in here! -L
---DG (DG for Digital)
These are large-aperture lenses with wide angles and short minimum focusing distances. With an abundance of peripheral illumination, they are ideal lenses for Digital SLR Cameras whilst retaining suitability for traditional 35mm SLRs.---
suitability for 35mm SLRs is the aperture ring.
canon mount 100-300's lack the aperture ring (don't know or care why- probably made later and sigma tried to cut production cost. The lens is discountined from sigma anyway so there may be an all digital replacement in the works. the only benifet from losing the aperture ring is cutting cost to the producer, that's why G nikkors got rid of the rings after the D lens series.
Cool thanks for the answers guys. I've never shot with a lens that had an aperture ring so didn't know if there was any hassle when shooting digital...like if the ring had to be de-activated through settings or anything like that...I assume it is very simple?
First, set the aperture to the smallest aperture setting (i.e. the largest number on the ring). Next, there should be a tab on the aperture ring that will lock it in. Once that is done you should be able to control the aperture on the camera.
Loren E wrote:
So once locked at F22 or F32, aperture priority on my D7000 would have full control? Can anyone confirm this?
This is correct. Nikon AF lenses with an aperture ring have a 'lock'. Older AI and AIS lenses don't have a lock and and some 3rd party lenses may not either. It doesn't matter. All that matters is that the aperture ring is set to its smallest. Then the camera controls the aperture automatically in Auto, P, S modes and you would control the aperture using the camera dials like any other 'G' lens in M and A modes.
The Canon EF mount controls the lens aperture electronically. The Nikon mount uses a mechanical linkage between the camera body and lens to control the aperture.
plubbry wrote:
This is correct. Nikon AF lenses with an aperture ring have a 'lock'. Older AI and AIS lenses don't have a lock and and some 3rd party lenses may not either. It doesn't matter. All that matters is that the aperture ring is set to its smallest. Then the camera controls the aperture automatically in Auto, P, S modes and you would control the aperture using the camera dials like any other 'G' lens in M and A modes.
The Canon EF mount controls the lens aperture electronically. The Nikon mount uses a mechanical linkage between the camera body and lens to control the aperture....Show more →
