A beginner needing a bit of advice, Canon 600d

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Sophie
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Hi everyone, i'm after some advice!
I have a Canon 600D and am new to photography, so this may well be a silly question!
When in full Manual mode, the aperture is changing from what I set it to when I zoom in on a subject, I am sure it never used to do this. Can anyone confirm that I am not going mad. It is definatly in M and changing f stops on it's own. I have 2 lenses and it is doing it with both lenses attatched, I have cleared all settings and it's not helped.

As I said, I really am a beginner so sorry if this is stupid question!

Thanks in advance
 
Hi sophie, that is quite normal unless you have a fixed aperture lens.
 
Hi sophie, Look at the f number on the lens. I ther are 2 numbers the lens will change to the smaller apature as you zoom in. There are no silly questions from beginers.
 
Thanks so much, can't tell you how much I was panicking about having to send it back and not having it here for Christmas!
 
As above :)

I normally use my prime lenses (fixed focal length) and found myself double checking myself when I used a zoom lens and wondered why I wasn't at f4 anymore
 
If you google your lens or tell us which you have here, you could probably find out the exact focal lengths that your aperture will automatically change, if you want to know.

Example, the Canon 18-55mm IS goes to f/4 at 24mm, and f/5 and 39mm.

Just remember to adjust shutter or ISO if zoomed in.
 
Bear in mind that if you have say a f/3.5-5.6 lens and you set it to 3.5 at the wide end and zoom in it will move to 5.6 at the long end (and may well then stay at 5.6 when you zoom back out again, I'm not sure, may depend on camera). But if you set it to f8 at the wide end it will stay f8 when you zoom in. It may be why you've not noticed it before?
 
Thanks everyone again, can't believe I've never noticed it before! Ive only had it since October so I'm pretty new to it all!
So good to have my mind put at ease :)
 
You might not have noticed it as if using a smaller aperture like f8 it wont change as you zoom as it's smaller than the widest aperture that the lens can use. You'll only see it change if the aperture you've selected is wider than the lens can go.
 
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