Nikon lens not showing correctly in exif: I have a old Nikon AF MICRO NIKKOR 105mm 1:2.8 D and I just noticed that in the exif of the photos I take is wrong. it shows as a Sigma 105mm...

JohnBoy5562 Loc: Alabama

I have a old Nikon AF MICRO NIKKOR 105mm 1:2.8 D and I just noticed that in the exif of the photos I take is wrong. it shows as a Sigma 105mm f2.8 EX DG. I put the lens on my D850 and my D7100 and both shows the the same. is their to make it show the correct exif info?

(Download)

larryepage Loc: North Texas area

JohnBoy5562 wrote:

I have a old Nikon AF MICRO NIKKOR 105mm 1:2.8 D and I just noticed that in the exif of the photos I take is wrong. it shows as a Sigma 105mm f2.8 EX DG. I put the lens on my D850 and my D7100 and both shows the the same. is their to make it show the correct exif info?

It is also interesting that it is showing the focal length as 157mm. Do you have your camera set up to show detailed info when you review images in-camera? I'd suggest taking a look at that to see if the problem is with your camera and/or lens or with your editor/EXIF viewer. 157mm would be the effective focal length if that lens was used on a DX camera.

JohnBoy5562 Loc: Alabama

larryepage wrote:

It is also interesting that it is showing the focal length as 157mm. Do you have your camera set up to show detailed info when you review images in-camera? I'd suggest taking a look at that to see if the problem is with your camera and/or lens or with your editor/EXIF viewer. 157mm would be the effective focal length if that lens was used on a DX camera.

D850

JohnBoy5562 Loc: Alabama

It has to do with the lens because it show as a Sigma on both cameras. And it’s the same if I transfer the photos with the cable hooked up to the camera to transfer the photos or if I use a card reader. So both the 7100 and 850 see the lens as a sigma.

larryepage Loc: North Texas area

JohnBoy5562 wrote:

It has to do with the lens because it show as a Sigma on both cameras. And it’s the same if I transfer the photos with the cable hooked up to the camera to transfer the photos or if I use a card reader. So both the 7100 and 850 see the lens as a sigma.

But they both correctly see it as a 105mm lens, not 157mm as reported. I think that your EXIF viewer is somehow corrupting the information. What we can see of it on your camera display is correct... The display panel you showed us originally must have been from the D7100. I guess a conversion to 157mm is not out of the question there.

Do you have a second editor or another different way to look at the data just to make sure?

**Edit**I see in your other post that Snapbridge is doing this. Try without using Snapbridge. It has a history of doing flaky things.

JohnBoy5562 Loc: Alabama

I did I hook both my camera up to my iMac and used photos. And when I look at the exif it the same that SnapBridge shows.

larryepage Loc: North Texas area

JohnBoy5562 wrote:

I did I hook both my camera up to my iMac and used photos. And when I look at the exif it the same that SnapBridge shows.

Understood. I have to confess to being pretty much stumped right now.

JohnBoy5562 Loc: Alabama

JohnBoy5562 wrote:

I did I hook both my camera up to my iMac and used photos. And when I look at the exif it the same that SnapBridge shows.

I black and white I edited and it was imported from my camera with a cable on my iMac the color one was dragged off from a card reader to the desktop. The exif is the same. I uploaded the original files so you can look at exif data.

(Download)

flip1948 Loc: Hamden, CT

larryepage wrote:

It is also interesting that it is showing the focal length as 157mm. Do you have your camera set up to show detailed info when you review images in-camera? I'd suggest taking a look at that to see if the problem is with your camera and/or lens or with your editor/EXIF viewer. 157mm would be the effective focal length if that lens was used on a DX camera.

Which is exactly the case...it is showing 157mm when used on the D7100...DX.

larryepage Loc: North Texas area

flip1948 wrote:

Which is exactly the case...it is showing 157mm when used on the D7100...DX.

You are correct. I was scanning quickly before I wrote that and didn't notice that the photo was from the D7100. Discussion had been mostly about the D850, and that was what was on my mind.

John...I don't have my photography computer with me, so it will be a while before I can look at the exif. Maybe a kind soul will look at it on the meantime...

Architect1776 Loc: In my mind

JohnBoy5562 wrote:

I have a old Nikon AF MICRO NIKKOR 105mm 1:2.8 D and I just noticed that in the exif of the photos I take is wrong. it shows as a Sigma 105mm f2.8 EX DG. I put the lens on my D850 and my D7100 and both shows the the same. is their to make it show the correct exif info?

Could be a rebranded Sigma lens?

CHG_CANON Loc: the Windy City

Make sure the firmware is up to date on all the cameras involved. From the Nikon support page for the D7100, there is both firmware and Lens Distortion Control information. I'm not promising as a solution, but you definitely want these updates installed as you analyze data errors in the camera's software.

agillot

Do a google on that lens , it could be a sigma made , sold under another brand name .

Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)

JohnBoy5562 wrote:

I black and white I edited and it was imported from my camera with a cable on my iMac the color one was dragged off from a card reader to the desktop. The exif is the same. I uploaded the original files so you can look at exif data.

In exiftool, I see two entries. For Lens it shows "Sigma Macro 105mm F2.8 EX DG", and for Lens ID it shows "AF Micro-Nikkor 105mm f/2.8D or Sigma Macro 105mm F2.8 EX DG".

There is a serial number for the lens - 3061660 - which does not seem to be consistent with the Nikon serial numbers for this lens as listed on this site:

http://www.photosynthesis.co.nz/nikon/serialno.html

This is a mystery, but if it doesn't affect the image, it is just an exercise. The lens has such few flaws like vignetting and distortion, it is unlikely to need any lens profile to improve the image.

larryepage Loc: North Texas area

Gene51 wrote:

In exiftool, I see two entries. For b Lens /b it... (show quote)

My thoughts now go to whether the lens might have been repaired somewhere along the way, perhaps using parts taken from another lens, or perhaps loaded improperly with firmware...