Crop factor and aperture

swanlefitte · 01-16-2023, 01:12 PM

Originally posted by Wheatfield

We should really get back to the topic of the thread.

If I crop after the fact, did I use a different f-stop? My friend, who also uses an Olympus and gets great results, always tells me his lens in 36mm terms. I counter that I can crop my photo in post and my lens becomes his FF equivalent.

As to noise, he used to shoot as a pro with a Hasselblad and Zeiss glass and has no problems with his m3/4 sensor camera. I have seen his 28" x21" (4x3) prints and they are beautiful.

and Norm, He was with me and took a better photo than me of a woodpecker with wood chips flying! He got the male spitting them out though and not chipping them two days after I caught this couple fighting.

normhead · 01-16-2023, 07:46 PM

Quote:

But you double the amount of light you reduce the noise and then you increase the accuracy of the values placed into the color space

You do realize that reciprocity expresses itself in higher noise on digital? So you can increase your time, but reciprocity may take away any advantage. The value of 32 ISO can only be established by side to side images, taken with the same camera , maybe 32 64 and 100 ISO, then looking at the image at the size it should be displayed. One picture is not a comparison.

**que es tu** · 01-17-2023, 07:27 AM

Carry on everyone! I am learning a lot though most is a bit too advanced for me!

normhead · 01-17-2023, 07:40 AM

Originally posted by swanlefitte

As to noise, he used to shoot as a pro with a Hasselblad and Zeiss glass and has no problems with his m3/4 sensor camera. I have seen his 28" x21" (4x3) prints and they are beautiful.

I had beautiful used 4/3 system in my sights for a while at price I could afford to buy just to play with., but it was just too far away to acquire...

Quote:

Carry on everyone! I am learning a lot though most is a bit too advanced for me!

You're probably assimilating more than you think.

**que es tu** · 01-17-2023, 08:43 AM

Originally posted by normhead

I had beautiful used 4/3 system in my sights for a while at price I could afford to buy just to play with., but it was just too far away to acquire...

You're probably assimilating more than you think.

Yes, usually after information “cooks” for a while things become clearer!

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01-16-2023, 01:12 PM	#106
swanlefitte Pentaxian Join Date: May 2015 Location: Minneapolis Photos: Gallery Posts: 4,026	Originally posted by Wheatfield We should really get back to the topic of the thread. If I crop after the fact, did I use a different f-stop? My friend, who also uses an Olympus and gets great results, always tells me his lens in 36mm terms. I counter that I can crop my photo in post and my lens becomes his FF equivalent. As to noise, he used to shoot as a pro with a Hasselblad and Zeiss glass and has no problems with his m3/4 sensor camera. I have seen his 28" x21" (4x3) prints and they are beautiful. and Norm, He was with me and took a better photo than me of a woodpecker with wood chips flying! He got the male spitting them out though and not chipping them two days after I caught this couple fighting.

01-16-2023, 07:46 PM	#107
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,420	Quote: But you double the amount of light you reduce the noise and then you increase the accuracy of the values placed into the color space You do realize that reciprocity expresses itself in higher noise on digital? So you can increase your time, but reciprocity may take away any advantage. The value of 32 ISO can only be established by side to side images, taken with the same camera , maybe 32 64 and 100 ISO, then looking at the image at the size it should be displayed. One picture is not a comparison.

01-17-2023, 07:27 AM	#108
que es tu Site Supporter Join Date: Feb 2020 Location: Smoky Mountains, NC Photos: Gallery \| Albums Posts: 1,114 Original Poster	Carry on everyone! I am learning a lot though most is a bit too advanced for me!

01-17-2023, 07:40 AM	#109
normhead Pentaxian Join Date: Jun 2007 Location: Near Algonquin Park Photos: Gallery \| Albums Posts: 40,420	Originally posted by swanlefitte As to noise, he used to shoot as a pro with a Hasselblad and Zeiss glass and has no problems with his m3/4 sensor camera. I have seen his 28" x21" (4x3) prints and they are beautiful. I had beautiful used 4/3 system in my sights for a while at price I could afford to buy just to play with., but it was just too far away to acquire... Quote: Carry on everyone! I am learning a lot though most is a bit too advanced for me! You're probably assimilating more than you think.

01-17-2023, 08:43 AM	#110
que es tu Site Supporter Join Date: Feb 2020 Location: Smoky Mountains, NC Photos: Gallery \| Albums Posts: 1,114 Original Poster	Originally posted by normhead I had beautiful used 4/3 system in my sights for a while at price I could afford to buy just to play with., but it was just too far away to acquire... You're probably assimilating more than you think. Yes, usually after information “cooks” for a while things become clearer!

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