ISO Problem

ersler · 02-27-2019, 10:33 AM

Hi!
I have been using my 645D for 7 years now and I have just recently I realized I can't no longer swith ISO down to 100. I guess I probably accidentally pressed some button during shooting. No idea. May be it's an error or something. I have checked camera's menu from top to the button with no result. ISO expanded sensibility, high iso noise reduction and all other functions. All useless. I am still on 200 or higher and can't get down to 100. I would be very grateful for any kind of advice or suggestions. Thanks!

stevebrot · 02-27-2019, 11:20 AM - **2 Likes**

Expanded Sensitivity turned "ON" (C1 Menu)? Highlight Correction turned "ON" (Record Mode Menu, D-Range)?

Steve

ersler · 02-27-2019, 12:20 PM

Originally posted by stevebrot

Expanded Sensitivity turned "ON" (C1 Menu)? Highlight Correction turned "ON" (Record Mode Menu, D-Range)?

Steve

Wow... it realy was Highlight Correction! Danm! Thank you very much!

stevebrot · 02-27-2019, 12:27 PM

My pleasure!

Steve

**Lowell Goudge** · 02-27-2019, 01:05 PM

the same function is on a lot of DSLRs, i forget now when it occurred, between the K10 or K7, with the same impact, the highlight protection essentially limits the minimum ISO to 2 x the base supported by the camera

**Kobie** · 02-27-2019, 09:32 PM

^^^ This. I remember on my K200D there was an expanded Dynamic Range mode or something or other, but it would then set the base ISO at 200 and not 100.
I was going to mention this but y'all beat me to it lol

02-27-2019, 10:33 AM	#1
ersler New Member Join Date: Jun 2017 Posts: 7	ISO Problem Hi! I have been using my 645D for 7 years now and I have just recently I realized I can't no longer swith ISO down to 100. I guess I probably accidentally pressed some button during shooting. No idea. May be it's an error or something. I have checked camera's menu from top to the button with no result. ISO expanded sensibility, high iso noise reduction and all other functions. All useless. I am still on 200 or higher and can't get down to 100. I would be very grateful for any kind of advice or suggestions. Thanks!

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02-27-2019, 11:20 AM - 2 Likes	#2
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	Expanded Sensitivity turned "ON" (C1 Menu)? Highlight Correction turned "ON" (Record Mode Menu, D-Range)? Steve

02-27-2019, 12:20 PM	#3
ersler New Member Join Date: Jun 2017 Posts: 7 Original Poster	Originally posted by stevebrot Expanded Sensitivity turned "ON" (C1 Menu)? Highlight Correction turned "ON" (Record Mode Menu, D-Range)? Steve Wow... it realy was Highlight Correction! Danm! Thank you very much!

02-27-2019, 12:27 PM	#4
stevebrot Otis Memorial Pentaxian Join Date: Mar 2007 Location: Vancouver (USA) Photos: Gallery \| Albums Posts: 42,007	My pleasure! Steve

02-27-2019, 01:05 PM	#5
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,892	the same function is on a lot of DSLRs, i forget now when it occurred, between the K10 or K7, with the same impact, the highlight protection essentially limits the minimum ISO to 2 x the base supported by the camera

02-27-2019, 09:32 PM	#6
Kobie Site Supporter Join Date: Oct 2014 Location: Bowmanville Photos: Albums Posts: 1,211	^^^ This. I remember on my K200D there was an expanded Dynamic Range mode or something or other, but it would then set the base ISO at 200 and not 100. I was going to mention this but y'all beat me to it lol