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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 13 Jul 2013 (Saturday) 11:17
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Aperture blade problem...

 
Photo123abc
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Jul 13, 2013 11:17 |  #1

Hi, so my Tamron 90mm macro had a weird bug today, aperture blades got stuck couple of times.

Now it seems to be working again just fine as I cleaned the contacts, though couldnt see any obvious dirst in them.

But should I be worried, is this meaning that its going to break in near future? Anyone else had similar problems? Thanks.

-Ville Miettinen


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outmywindow
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Jul 13, 2013 11:50 |  #2

I don't own that lens in particular, but first I would try to see if the problems reappears or is reproducible. Sometimes these types of things happen for very small minute reasons and don't always necessarily imply impending failure. If your copy of the lens is still under warranty, I would probably send it in for repair to Tamron if you end up having stuck aperture blades again.


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davidfarina
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Jul 13, 2013 13:56 |  #3

outmywindow wrote in post #16116848 (external link)
I don't own that lens in particular, but first I would try to see if the problems reappears or is reproducible. Sometimes these types of things happen for very small minute reasons and don't always necessarily imply impending failure. If your copy of the lens is still under warranty, I would probably send it in for repair to Tamron if you end up having stuck aperture blades again.

Id send it in now, its too late when the warranty is expired...


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outmywindow
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Jul 13, 2013 14:49 |  #4

davidfarina wrote in post #16117084 (external link)
Id send it in now, its too late when the warranty is expired...

I didn't say don't send it in. I said send it in if the OP still has the lens under warranty. Not sure why you thought I said otherwise.


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Canon ­ Bob
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Jul 14, 2013 06:07 as a reply to  @ outmywindow's post |  #5

Set it f/32 and toggle the DoF preview button a few times, Ville.....it may be a small spec of dust on one of the blades and this could shake it free.

Bob


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Photo123abc
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Jul 15, 2013 05:43 |  #6

Warranty is expired like 3 years ago, so thats not gonna help.

I tried use it normaly and problem re-apeared when I turn the focusing ring. Only position it doesnt jam is at infinity. Also tried the DoF preview, it seems that it wont go to f/32, only to f/18 approx. But when taking pictures it does go to f/32.


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davidfarina
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Jul 15, 2013 08:58 |  #7

If its still an issue and you cant live/work with that lens this way, id recommend, try everything which could solve the issue. Try the DOF preview few times shake the lens whatever. If nothing will help, you have to decide whether you want to send it to repair, or you just open it up yourself. If youll break it, its not the end of the world as the lens is unusable anyway...

Whatever you do, good luck hope the issue gets solved!


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Photo123abc
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Jul 16, 2013 06:27 |  #8

I decided to buy new lens, probably going for Sigma 105mm f/2.8 EX DG OS HMS or Canon 100mm f/2.8 USM macro. Most likely Sigma because it has image stabilator.

However, I am going to save that Tamron for now, and when I get tired of it, I open it and check whats inside. :)


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davidfarina
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Jul 16, 2013 06:40 |  #9

Photo123abc wrote in post #16124508 (external link)
I decided to buy new lens, probably going for Sigma 105mm f/2.8 EX DG OS HMS or Canon 100mm f/2.8 USM macro. Most likely Sigma because it has image stabilator.

However, I am going to save that Tamron for now, and when I get tired of it, I open it and check whats inside. :)

I read on a thread here that someone removed the front elements of a 35-80mm canon lens (which costs about 50$) and transformed it to a macro lens that way. The magnification level is more than 1:1 so its a cheap very nice macro solution, worth to mention it :)

He also had a modification instruction:

https://photography-on-the.net/forum/showthre​ad.php?t=190428


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Photo123abc
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Jul 16, 2013 11:47 |  #10

Yes Ive heard about that guy too. Though I use my macro along with 70-200 also for portrait shootings, also I like macros because their sharpness and low light performance so I need "real" macro lens instead of diy.


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davidfarina
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Jul 17, 2013 02:44 |  #11

Photo123abc wrote in post #16125294 (external link)
Yes Ive heard about that guy too. Though I use my macro along with 70-200 also for portrait shootings, also I like macros because their sharpness and low light performance so I need "real" macro lens instead of diy.

Okey, just thought id let you know :)
Someone in this thread wrote, damn now i feel very stupid paying 1500$ for the MPE-65, dont want that this happens to you too hahaha


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Photo123abc
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Jul 18, 2013 04:55 |  #12

Hah, Ive also heard about people who send MPE-65 back to shop where he bought it, because it didnt focus to anything. He tried to photograph landscape with it. ;)


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davidfarina
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Jul 18, 2013 06:31 |  #13

Photo123abc wrote in post #16130733 (external link)
Hah, Ive also heard about people who send MPE-65 back to shop where he bought it, because it didnt focus to anything. He tried to photograph landscape with it. ;)

Hahahaha nice one too xD


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amfoto1
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Jul 18, 2013 10:39 |  #14

Photo123abc wrote in post #16124508 (external link)
I decided to buy new lens, probably going for Sigma 105mm f/2.8 EX DG OS HMS or Canon 100mm f/2.8 USM macro. Most likely Sigma because it has image stabilator.

However, I am going to save that Tamron for now, and when I get tired of it, I open it and check whats inside. :)

I'd probably buy the Canon over the Sigma. For one thing, OS is of little help at macro magnifications. Also, the Sigma can't be fitted with a tripod ring, the Canon can (optionally). A tripod ring is a very nice accessory to have on a macro lens.

I do like that the Sigma has a three zone focus limiter, compared to the two zone on the Canon (the newer Canon 100/2.8L IS has a three zone limiter).

I also like that the Sigma comes with a lens hood... well actually with two: one matched to the lens for use on full frame, the other for crop cameras. The Canon 100/2.8 USM's lens hood is sold separately and is quite large.

But I'd still probably save some money and get the Canon 100/2.8 USM over the Sigma 105 OS... because the IQ is tops, it can be fitted with a tripod ring, and I don't need stabilization on a macro lens because it's of little help at higher magnifications.


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Photo123abc
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Jul 18, 2013 12:32 |  #15

Every little helps, I prefer to shoot other things (portraits, street photography) with macro as well, so thats why I go for Sigma.

Canon has better IQ, but these days pretty much every macro does have good enough IQ, and Sigma has very low chromatic aberration as well.


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Aperture blade problem...
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