Mark on SL24-90 Lens

[Schittra]

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I found small mark (in red circle) from my 24-90 lens. I didn’t realize until I shoot at f/22 and it’s more obvious.

It’s not from the camera. I use with other lenses and no mark (see green circle). 

I clean filter and glass already. But the mark is not disappeared, bro. Can you please suggest please? Thank you very much.

 

It is a used lens, so I didn't expect perfect.

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[LeicaR10]

Schittra,  The dark brownish circle looks like dust  on your camera sensor.  You might need a magnifying glass to see it on the sensor.  If you are not familiar with cleaning the sensor, there are You Tube videos out that will show you how to clean it.  If you feel uncomfortable cleaning the sensor, take it to a good camera shop that does this service and they will clean it.  Some don't charge if you bought the camera from them, others charge a nominal fee.  It is something that can be done while you wait.  If you don't want to clean your sensor, (but you should) you can remove the spot from your photos in Light Room or Photo Shop.  Last, I would check to see if using a hand bulb air blower to remove the dust from the sensor with a couple bursts of air first before doing a wet clean or taking it to a camera store.  In high humidity sometimes dust just sticks to the sensor glass. Hope this helps.  r/ Mark

[Schittra]

4 minutes ago, LeicaR10 said:

Schittra,  The dark brownish circle looks like dust  on your camera sensor.  You might need a magnifying glass to see it on the sensor.  If you are not familiar with cleaning the sensor, there are You Tube videos out that will show you how to clean it.  If you feel uncomfortable cleaning the sensor, take it to a good camera shop that does this service and they will clean it.  Some don't charge if you bought the camera from them, others charge a nominal fee.  It is something that can be done while you wait.  If you don't want to clean your sensor, (but you should) you can remove the spot from your photos in Light Room or Photo Shop.  Last, I would check to see if using a hand bulb air blower to remove the dust from the sensor with a couple bursts of air first before doing a wet clean or taking it to a camera store.  In high humidity sometimes dust just sticks to the sensor glass. Hope this helps.  r/ Mark

Hi

Thank you for the input. It's not the mark on the sensor. I thought the same thing. The sensor was cleaned last week by myself. I did many times on my cameras before. I tried my SL with other lenses (see example of green circle) and no problem. So it's the lens, not the camera. 

[lykaman]

Well, I suppose your alternatives are:- Return for exchange or Refund, have the lens CLA'd, use it and PP the mark out -  L

[LeicaR10]

Schittra,  OK.  If the dust is inside your lens that is a whole different scenario.  You wrote the photo was taken at f/22.  If you shoot in what would be a normal f/stop range f/2.8 to f/8 you shouldn't see it.  Try it...if its the lens and it bothers you, plan on sending it to Leica for a CLA as Lykaman suggested above.  Hope this helps.  r/ Mark

Edited April 23, 2020 by LeicaR10
Grammar

[Schittra]

The mark is more visible at wide angle (24mm). It's almost disappear at 50mm. 

I thought it was from sensor - because zoom lens is a moving element. The mark is at the same position. However, it doesn't show in other M lenses (e.g., cron 90, lux 50, lux 35). I think it's from the front or rear glass elements. I cleaned already but still there.

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[chasdfg]

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Have you tried using a torch to look through the lens?  I understand the SL lens apertures close down halfway when not mounted. Maybe look at it unmounted first, if this doesn't work (can't see anything due to the blades), mount it and shine a torch through when the lens is wide open. It may reveal a large enough speck of dust which has been causing the spot.

[Jared]

Based on the size of the spot and the f-stop it is almost certainly on the rear element.  The reason it is almost gone by 35mm or 50mm is that the rear element moves farther from the sensor as you zoom.  Check the rear element of your lens. Perhaps the speck of dust is on the outside and can be cleaned.  

Edited April 23, 2020 by Jared
Typo

[Luca]

I had same problem with SL2 .

I changed my lens and forgot to switch camera off, so dust was attracted by the sensor.

Similar spots were appearing both on vario and on 50mm but only above f11.

With some a dust air blower  I was able to clean the sensor.

Hope this helps

[wizard]

Is it just me or is it due to lack of resolution of my laptop's display? In all the examples above, while I can clearly see the red circle, I fail to see any mark whatsoever within that red circle.

Edited April 24, 2020 by wizard
word missing

[RoySmith]

12 hours ago, wizard said:

Is it just me or is it due to lack of resolution of my laptop's display? In all the examples above, while I can clearly see the red circle, I fail to see any mark whatsoever within that red circle.

I could see it but it was very faint.

[xrogers]

If you haven't already, I'd first suggest testing without the filter.

This Roger Cicala article does some tests that may be relevant to finding this problem. According to Roger's results, you should be looking at the front elements. When looking for dust, absolutely use a torch/flashlight through the lens, it make dust obvious (and makes even some outstanding lenses look unusably dusty).

https://www.lensrentals.com/blog/2011/08/the-apocalypse-of-lens-dust/

I hesitate to admit it, but if I couldn't see a defect anywhere in the lens, and the spot is only visible at f22 when focusing close at 24mm, and the lens is otherwise excellent, I'd just ignore it. I'd rarely (if ever) use that combination of settings, and would clone the defect out if it was noticeable on those occasions.