100mm macro aperture iris
Posted 22/02/2014 - 13:17
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Are your photos correctly exposed?
Ken
“We must avoid however, snapping away, shooting quickly and without thought, overloading ourselves with unnecessary images that clutter our memory and diminish the clarity of the whole.” - Henri Cartier-Bresson -
“We must avoid however, snapping away, shooting quickly and without thought, overloading ourselves with unnecessary images that clutter our memory and diminish the clarity of the whole.” - Henri Cartier-Bresson -
Posted 22/02/2014 - 14:38
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That is something I must check asap Ken, as I have now noticed that the iris does not always close down to exactly the same size aperture!
Obviously there is some 'stiction' present.
Logic would suggest damp on the blades although I do take very great care of my lenses and their storage.
Roger
Obviously there is some 'stiction' present.
Logic would suggest damp on the blades although I do take very great care of my lenses and their storage.
Roger
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424 posts
16 years
Surrey
Even on my oldest Pentax lenses the irises close down with an audible click.
The macro lens aperture closes quite quickly but is definitely slightly sluggish and is completely silent.
I admit I do not use it very often as I generally prefer the Sigma 105 - but then I could say that of many of my 'Legacy' lenses.
Of course the guarantee has just expired.
Has anyone experienced this and perhaps found a simple cure? My 'buying expensive lens days' are, sadly, in the past.