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  Previous versions of bwcolor's message #16896252 « Is This a Spot on Sensor, or A Sun Spot on Sensor »

  

bwcolor
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Is This a Spot on Sensor, or A Sun Spot on Sensor


Different lens and two apertures. Size changes with aperture and spot location different than with other lens. So, this isn’t the sensor. I guess the question now is is it the rear elements of these lenses, or the cover glass.

Next set, different lens and looks totally different, so am I correct in thinking that I’ve simply been imaging rear lens glass debris?

Loxia 85mm @f/22focused at infinity and single shot mode:

f22 by gary, on Flickr


@f/16
f16 by gary, on Flickr


Sigma 90mm f/2.8 DG DN @ f/22

[frameA7CR Sigma 90mm f-2.8 DG DN-1 by gary, on Flickr


@f/16

A7CR Sigma 90mm f-2.8 DG DN-2 by gary, on Flickr



Sep 24, 2025 at 11:43 AM
bwcolor
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Is This a Spot on Sensor, or A Sun Spot on Sensor


Different lens and two apertures. Size changes with aperture and spot location different than with other lens. So, this isn’t the sensor. I guess the question now is is it the rear elements of these lenses, or the cover glass.

Next set, different lens and looks totally different, so am I correct in thinking that I’ve simply been imaging rear lens glass debris?

Loxia 85mm @f/22focused at infinity and single shot mode:

f22 by gary, on Flickr


@f/16
f16 by gary, on Flickr

Sigma 90mm f/2.8 DG DN @ f/22

[frameA7CR Sigma 90mm f-2.8 DG DN-1 by gary, on Flickr


@f/16

[frameA7CR Sigma 90mm f-2.8 DG DN-2 by gary, on Flickr



Sep 24, 2025 at 11:42 AM
bwcolor
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Upload & Sell: Off
Re: Is This a Spot on Sensor, or A Sun Spot on Sensor


Different lens and two apertures. Size changes with aperture and spot location different than with other lens. So, this isn’t the sensor. I guess the question now is is it the rear elements of these lenses, or the cover glass.

Loxia 85mm @f/22focused at infinity and single shot mode:

f22 by gary, on Flickr


@f/16
f16 by gary, on Flickr



Sep 24, 2025 at 11:28 AM





  Previous versions of bwcolor's message #16896252 « Is This a Spot on Sensor, or A Sun Spot on Sensor »