Infinity: I have a Nikkor 18-105mm lens and a Nikkor 55-300mm lens. Neither focusing ring (for manual focus) have any markings. Is there a way to determine infinity on the lenses? Also...

Mac Loc: Pittsburgh, Philadelphia now Hernando Co. Fl.

I have a Nikkor 18-105mm lens and a Nikkor 55-300mm lens. Neither focusing ring (for manual focus) have any markings. Is there a way to determine infinity on the lenses?

Also if it is in AF mode does it cause any damage if the focusing ring is turned?

Wabbit Loc: Arizona Desert

Mac wrote:

I have a Nikkor 18-105mm lens and a Nikkor 55-300mm lens. Neither focusing ring (for manual focus) have any markings. Is there a way to determine infinity on the lenses?

Also if it is in AF mode does it cause any damage if the focusing ring is turned?

With any lens infinity will be the extreme movement of the focus ring in one direction. Easy to figure out in manual focus mode

Your 18-105 can be manually focused while in auto focus mode by gently turning the focus ring, it's designed to do this. But I'm not so sure about your 55-300mm. Don't force the ring but gently try to turn it. If the focus ring doesn't move and seems to be in a fixed position it means that the answer is No. You have to turn off the auto focus switch on the side of the lens in order to manually focus.

snowbear

If the lens has the designation "AF-S" you can turn the ring without any issue, on any camera.

Wabbit Loc: Arizona Desert

snowbear wrote:

If the lens has the designation "AF-S" you can turn the ring without any issue, on any camera.

"Incorrect" Not all AF-S Nikkor lenses have this feature.

It's called Manual Focus Override.

There are Nikkor lenses that are not AF-S that do have Manual Focus Override.

snowbear

ring wrote:

snowbear wrote:

If the lens has the designation "AF-S" you can turn the ring without any issue, on any camera.

"Incorrect" Not all AF-S Nikkor lenses have this feature.

Since the motor is in the lens, it will not harm the body's AF screw (it one exists) to manually override the AF.

If this is incorrect, please specify which AF-S lenses can not.

Wabbit Loc: Arizona Desert

snowbear wrote:

ring wrote:

snowbear wrote:

If the lens has the designation "AF-S" you can turn the ring without any issue, on any camera.

"Incorrect" Not all AF-S Nikkor lenses have this feature.

Since the motor is in the lens, it will not harm the body's AF screw (it one exists) to manually override the AF.

If this is incorrect, please specify which AF-S lenses can not.

As-S refers to the silent wave (newer style) auto focus motor.

If the lens has Manual Focus Override you can easily turn the focus ring when in auto focus mode. But if the lens does not have the Manual Focus Override feature the focus ring will Not turn unless you force it, and if you do .... no more auto focus.

My 16-85mm AF-S, and 18-105mm AF-S, 70-300AF-S, and 35mm AF-S do have Manual Focus Override as well as my 18-200 which is not a AF-S lens

Both my 18-55mm AF-S, and my 55-200mm AF-S lenses do Not have Manual Focus Override.

You'd have to check lens specs individually to see which ones have it and which ones don't

snowbear

I stand corrected.

naturepics43 Loc: Hocking Co. Ohio - USA

snowbear wrote:

If the lens has the designation "AF-S" you can turn the ring without any issue, on any camera.

I think ( but not possitive) if the lens mount is plastic, it does NOT have manual override. You have to switch to manual.

Mac Loc: Pittsburgh, Philadelphia now Hernando Co. Fl.

Mac wrote:

I have a Nikkor 18-105mm lens and a Nikkor 55-300mm lens. Neither focusing ring (for manual focus) have any markings. Is there a way to determine infinity on the lenses?

Also if it is in AF mode does it cause any damage if the focusing ring is turned?

I don't mean to use the focus ring to focus in AF. If it is set to AF and the focus ring is accedentally turned, will that harm the lens? Sorry I didn't state the question better.

Wabbit Loc: Arizona Desert

Mac wrote:

I have a Nikkor 18-105mm lens and a Nikkor 55-300mm lens. Neither focusing ring (for manual focus) have any markings. Is there a way to determine infinity on the lenses?

Also if it is in AF mode does it cause any damage if the focusing ring is turned?

I don't mean to use the focus ring to focus in AF. If it is set to AF and the focus ring is accedentally turned, will that harm the lens? Sorry I didn't state the question better.

"If it set to AF the focus ring is locked, you would have to force the focus ring to turn", It will Not turn easily.

If you force it, and you will know that you forced it, you will hear and feel a snap or crack, you will no longer have auto focus with that lens.

Jay Pat Loc: Round Rock, Texas, USA

ring wrote:

If you force it, and you will know that you forced it, you will hear and feel a snap or crack, you will no longer have auto focus with that lens.

I hope I never hear that noise.......

naturepics43 Loc: Hocking Co. Ohio - USA

ring wrote:

quote=Mac quote=Mac I have a Nikkor 18-105mm len... (show quote)

Not all Nikon lenses work the same. When my 80-200 is in AF, the focus ring is locked. When my 80-400 is in AF, the focus ring turns freely. I too would like toknow if turning it harms the lens. Does anyone know for sure?

ShooterOR

Jay Pat wrote:

ring wrote:

If you force it, and you will know that you forced it, you will hear and feel a snap or crack, you will no longer have auto focus with that lens.

I hope I never hear that noise.......

I was volunteering at the local food bank and stepped on some macaroni that had fallen on the floor. If you hear that sound, get out the plastic

Wabbit Loc: Arizona Desert

naturepics43 wrote:

quote=ring quote=Mac quote=Mac I have a Nikkor ... (show quote)

Yep, I know, But I'm not telling just yet, You have to beg!

naturepics43 Loc: Hocking Co. Ohio - USA

Not all Nikon lenses work the same. When my 80-200 is in AF, the focus ring is locked. When my 80-400 is in AF, the focus ring turns freely. I too would like toknow if turning it harms the lens. Does anyone know for sure?[/quote]

Yep, I know, But I'm not telling just yet, You have to beg![/quote]

AAWWW please tell us