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why do some lenses have aperture ring on them and some don't
With the lens that have aperture ring, how does the camera control the aperture, does that mean the camera can't have aperture priority mode?..

Comments (8)

Aperture rings are found on old manual focus lenses. The aperture was adjusted by turning the aperture ring on the lens. Todays lenses do not have aperture rings because the aperture is controlled electronically - the camera tells the lens what aperture to use. Depending on what camera system you are using, you most likely need an adapter to use the old manual focus lenses on your camera..

'I reject your reality and substitute my own' -Adam Savagehttp://www.flickr.com/photos/mrnoronha/sets/..

Comment #1

I'm suspecting you will have to run the aperture manually..

The camera should display an error or something. If there's no "chips" in the lens then it will be manual only I think. If the lens can be used with any of the modern features, it would have the round pin contacts on the mount. If not, then it's a manual only lens..

Pentax takes the old school lenses well. Canon won't, only certain EOS mounts. Nikon I think, uses an adapter for some, but not 100% sure.'OOOOOH, they have the Internet on computers now!' Homer J. Simpson..

Comment #2

New_type wrote:.

With the lens that have aperture ring, how does the camera controlthe aperture, does that mean the camera can't have aperture prioritymode?.

Many such lenses have the usual numbered apertures, as well as an "Auto" position. With the aperture ring set to Auto, the camera will control the aperture setting..

The main reason the aperture ring is missing on modern lenses is to save on manufacturing costs.Regards,Peter..

Comment #3

Is there any lens with aperture ring, zoom ring and focus ring all on one lens. couldn't it be a bit hard to control?..

Comment #4

Aperture rings were used when you manually set the aperture on the lens ( in ye old days, but still done by some folks and with some lenses )..

Modern camera bodies ( including film cameras ) have control links in the mount that allow the body to control the aperture automatically..

Some newer lenses have been built without an aperture ring, primarily to save money ( cost and price ). That's the sole reason for leaving out an aperture ring with one exception. A (very) few lens designs have only one aperture settings - these are mirror lenses designed for compact telephoto use..

Some older lenses and many newer ones have either a chip or other electronic whizz-bang or a setting on the aperture ring which you set the lens to before mounting it. The camera can then work out that you want it to control aperture. If you don't set this before mounting the camera will normally assume you want to control aperture yourself using the ring and won't change it..

Some older lenses, however, do not have the required support. Whether you can use them at all depends on the particular model of camera you have. This information should be in the manual. Some older lenses without any automatic support are such good lenses optically that some way of using them is usually supported, but it usually requires you to operate completely manually, including lens settings..

So aperture priority works fine with older lenses which are designed to allow automatic control of the aperture as long as you follow the instructions ( in the camera manual usually ) for mounting them..

StephenG.

Fuji S3 ProPentax K100DFuji S9600Fuji E900PCLinuxOS..

Comment #5

The 80-200mm zoom I picked up for Dad's old Pentax in college was a fixed barrel, aperture ring, and focus ring. the focus ring slid front back for the zoom function.'OOOOOH, they have the Internet on computers now!' Homer J. Simpson..

Comment #6

New_type wrote:.

Is there any lens with aperture ring, zoom ring and focus ring all onone lens. couldn't it be a bit hard to control?.

I guess that's why there were fewer photographers back in the sixties. When I got a Pentax Spotmatic with a built-in meter (that you set manually), I didn't think things could get any better.DavidDallas, TX..

Comment #7

Kmac1036 wrote:.

The 80-200mm zoom I picked up for Dad's old Pentax in college was afixed barrel, aperture ring, and focus ring. the focus ring slidfront back for the zoom function..

Some used the one-touch design, a single wide ring, slide to zoom, twist to focus. Plus the aperture ring of course..

Others used three independent rings. The aperture ring, right next to the camera body, has distinctive click-stops so you know if you've turned it by mistake (unlikely). Then a zoom ring, with hard ridges. Finally the wider focus ring, with a rubber grip, feels completely different to the zoom ring..

Operating such technology was very easy compared with modern equipment (not just cameras) having many tiny buttons and multi-level menus.Regards,Peter..

Comment #8

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