Issue with 16 35 GM

[Soenryu]

Hey all,

 

First thanks in advance for any help you can give me. I am noticing an issue with the 1635 gm lens I received. It takes amazing photos but when I push the f stop up to f16 or f22 I always notice a black mark show up in the photos at the same spot. I'm not sure if this is an issue with the camera A7II or the lens but I will try out my other lenses today. I first notice it shooting some landscapes of the eclipse but now I was taking some beach photos today and saw it happen again. The mark isn't there at f8. I will attach a pic I shot at f22 hopefully someone has a suggestion or I will have to put in for a replacement. Thanks!

 

Edit - attached the pic and it is in the upper middle of the photo. At first you would think it's a bird in flight but it's in every picture I take when the f stop is higher around f20 or 22

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[Jeffreykmd]

It is dirt on your sensor.

 

 

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[Jeffreykmd]

There is a great article on photography life.com disussing lens vs sensor dirt.

 

 

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[jayteepix]

Clearly you don't use such small apertures - your sensor is immaculate compared to mine <lol>

[Guest Jaf-Photo]

Like the posters above say, it's dust or dirt on the sensor (more likely) or rear element (less likely). Just get a rubber blower to keep them clean and avoid changing lenses in the conditions shown in your photo, i.e. at the beach because there is a lot of stuff flying around in the air that can end up in your camera gear.

[Soenryu]

I really appreciate everyone's responses! I ended up testing other lenses this morning and confirmed it was sensor dirt just as you had suggested. I've tried to clear it with the rubber blower I have but it didn't help. I'll probably just end up bringing it somewhere for a more thorough cleaning at a later time. Appreciate the article as well.

 

Have a great day!

[Jeffreykmd]

Blower brush is great. If that does not work. I recommend you learn how to use a sensor brush as well as how to wet clean your sensor. It will save you time and money in the future.

 

 

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[poloriton]

Utilisez le kit SensorKlearLoupe de LensPen, efficace et sans aucun danger pour le capteur  

Pour éviter la perte de netteté due à la diffraction évitez les ouvertures > F16~F22

[jstevensphoto]

I take my cameras to a local shop for wet sensor cleaning.   For me, it's worth $75 to know it will get done right and no chance of damage or making the problem worse.    I think most good camera stores offer sensor cleaning. 

[Volksaholic]

I've paid to have the sensor cleaned. Between the two local shops I use, once charges $35 and the other $75. For a simple clean the $35 shop gets the job done fine. I used to be nervous about doing any more than blowing off my sensor, but I took the plunge and bought some cleaning solution, swabs, and some other gear for  doing the job when the blower doesn't quite get it (which it does most of the time).

I've got 2 cameras so it's a minimum of $70 if I have to have them both cleaned. I shoot mostly landscapes and wildlife, and try to change lenses in my van before I go out but sometimes I want to do a lens change in the field. No matter how quick and careful I try to be, I seem to get the stray spec from time to time. For me I decided it was worth being equipped to clean the sensor in the van when I'm on the road rather than living with several days' worth of shots before I get back to town to have someone clean it for me. I can clean the shots in post-processing, or I can clean the camera when I notice there's a problem. Time will tell if I make a mess of it.