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iso 160?


bradreiman

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Matter of habit IMO.

I used to prefer 25/64/100 iso when i shot film and now i can't go slower than 200 iso with my APS digicams.

No problem provided shutter speeds are fast enough to get shallow DoF in bright sunlight.

1/8000s is OK for that.

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Brad - I assume you are looking at the same screen I saw in the French blog, which had ISO at the top, next to 160. But I believe the other numbers below it correspond to the compression and other aspects. I may be wrong, and this could be wishful thinking, as, like you, I shoot at slower ISOs in film. On my D2, I hardly ever shoot above 100 ISO. But if your data is simply that shot of the LCD showing 160 next to the ISO, it may be that there is a smaller ISO, just not shown. Or so I pray.

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From other menus, it looks like the top or bottom line of the red frame is hidden if there are more menu options available in that direction. For the ISO setting, the whole frame is visible so it looks like there are 5 ISO settings only, from 160 to 2500. For comparison, the R-D1 has 4 settings, 200, 400, 800, 1600.

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OFFICIAL FROM LEICA: ISOs - 160 - 320 - 640 - 1250 - 2500

 

Digital ISOs are pretty much hard-wired into the sensor. The low end (which is the "natural" ISO) is determined by how much charge the charge-coupled-device (CCD) can hold without overflowing (blowing highlights unrecoverably). The high end is determined by how much the signal can be amplified with "tolerable" noise - "tolerable" being a question of taste, of course.

 

Canon has a "low ISO pull" setting on some cameras to get down to ISO 50 - it is god-awful (pure cyan skies with blown clouds) compared to the normal low end of 100.

 

Just because Kodak picked ASA (now ISO) 400 for Tri-X does not make "even" ISOs the word of the Creator.

 

Kodachrome 64, Plus-X/FP4 (125), Portra 160, Tri-X Pro (320), GAF High-Speed slide film (500), Royal-X Pan (1250) - nothing magic about "100-200-400-800..."

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OFFICIAL FROM LEICA: ISOs - 160 - 320 - 640 - 1250 - 2500

 

 

Just because Kodak picked ASA (now ISO) 400 for Tri-X does not make "even" ISOs the word of the Creator.

 

..."

Professional Tri-X is rated at ISO 320........of course, it is only available in 120 & 220 rolls and sold only to certified Pros......:D

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Sure Andy but I'm simply used to 400 ISO and being able to set it on every camera gives me some confort. Imagine I'm working with a DMR and a M8: if I work in manual mode, I'll have to set a different speed on each of them.

 

Me too Pascal. It is like having to choose apertures like f3.4, 6.3, etc. Doable, but not so intuitive. I think most of the Leica crowd has been around since the hand held meter days...Maybe from Leica’s perspective, it will be difficult for anyone to make unfavorable comparisons with other cameras? With the 1Ds2 I can access a variety of ISOs, 100, 125, 160, 200, 250, 320, 400, 500, 640, 800, 1000, 1250, 1600, 3200 and I like that. I have never used 125, 160, 250 or 320. However, I think I will much prefer the size and weight of the M8, and I am really looking forward to using the APO 75 and messing around with the Noctilux (despite the 0.68 viewfinder - I am in LTC's camp on this one). Also a couple of people have said C1 works with the M8. I hope that is correct too. Obviously there is no way to completely please everyone - except to have a huge supply of these thngs ready to ship.

 

I wonder when we will see MTFs for the new 28? It is alluringly tiny..... How does it’s size and weight compare to the 28 Summicron?

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Sure Andy but I'm simply used to 400 ISO and being able to set it on every camera gives me some confort. Imagine I'm working with a DMR and a M8: if I work in manual mode, I'll have to set a different speed on each of them.

 

The difference between 320 ISO and 400 Iso is less than 1/3 of a stop. Y'all never notice

 

Rex

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