ISO WHAT?????????? Post em... - DPChallenge Forums

06/01/2007 11:42:03 PM · #1

okay so Jeff

rainmotorsports and I have come up with a plan to take some pictures at 4 different ISO's. I want to see how good your camera is.

Here is what you have to, With a tripod, Set your camera up about 6 feet away from an object that does not give off or reflect light well. Only using 1 regular light (lamp 100w house lamp) no flashes, or other light is allowed. Just one light... Set your camera at ISO 400 with a shutter time of 1/5th of a second (.2 of a sec). Take the picture then adjust your shutter time 1/2 for every ISO dropped. for example ISO400-1/5th, ISO300-1/2.5th, ISO100-1.3 F/Stop is 2.1, take 4 pictures and post them up. Lets see who's camera is BAD ASS.

Jeff you seeing the specs right??? if not I will edit them.

Message edited by author 2007-06-02 00:32:02.

06/02/2007 12:04:33 AM · #2

okay I can't set ISO300 manually on my camera but it does do a 300 on auto, go figure. anyway here are mine

Message edited by author 2007-06-02 00:08:59.

06/02/2007 12:13:55 AM · #3

YOU WENT THE WRONG DIRECTION!!
Lower iso SLOWER SHUTTER SPEED!

ISO 100 will probly need a second or so of exposure at that light atleast.

Most people will have program auto mode to go on.

Message edited by author 2007-06-02 00:17:08.

06/02/2007 12:19:26 AM · #4

Originally posted by RainMotorsports:

YOU WENT THE WRONG DIRECTION!!
Lower iso SLOWER SHUTTER SPEED!

ISO 100 will probly need a second or so of exposure at that light atleast.

Most people will have program auto mode to go on.

and that's my fault how??? hahaha okay let me reshoot.

06/02/2007 12:21:34 AM · #5

Well.....

When the iso 100 pic came out black...... i thought u might have noticed!

06/02/2007 12:23:35 AM · #6

I think you might have a slight flaw in your tests. As far as my understanding goes, if you double the ISO, then double your shutter speed and it will be a one stop change in light. So then you have
ISO 100 - 1/5
ISO 200 - 1/10
ISO 400 - 1/20
ISO 800 - 1/40
ISO 1600 - 1/80
etc.
I'm not sure how high of an ISO your camera can go, but try that general routine.

06/02/2007 12:26:50 AM · #7

I told him and i told him and hes off fixing it now why i had to be named......

06/02/2007 12:28:33 AM · #8

Oops, sorry. Well, that's probably why you can't set it to ISO300. :)

Nikon AF-S DX NIKKOR 18-200mm f/3.5-5.6G ED VR II

06/02/2007 12:30:56 AM · #9

Originally posted by RainMotorsports:

Well.....

When the iso 100 pic came out black...... i thought u might have noticed!

+

Okay it's fixed there look at that...

DjFenzl

06/02/2007 12:31:07 AM · #10

without 100% crops the pics won't really tell us anything

good_ham

Nikon D200

06/02/2007 12:32:34 AM · #11

Also, some of us don't have a lens that opens to f/2.1. I would think a smaller aperature would be a safer bet. f/8 perhaps?

06/02/2007 12:33:43 AM · #12

Originally posted by Megatherian:

without 100% crops the pics won't really tell us anything

Agreed, and did you zoom or move the camera for the ISO400 image? Probably should retake that one to keep everything the same.

Edit to add: You have a lot of movies by the way...

Message edited by author 2007-06-02 00:34:26.

06/02/2007 12:34:11 AM · #13

Originally posted by good_ham:

Also, some of us don't have a lens that opens to f/2.1. I would think a smaller aperature would be a safer bet. f/8 perhaps?

F/4 more realistic. F/2.8 common but not common enough.

06/02/2007 12:34:27 AM · #14

Originally posted by SamDoe1:

Originally posted by Megatherian:
without 100% crops the pics won't really tell us anything

Agreed, and did you zoom or move the camera for the ISO400 image? Probably should retake that one to keep everything the same.

It got reshot.

06/02/2007 12:38:00 AM · #15

Originally posted by RainMotorsports:

It got reshot.

In the pictures posted above, the ISO100 and ISO300 images have the exact same framing. The ISO400 image, however, seems to be a closer view of the same thing (there is no wall on the left side).

06/02/2007 12:38:19 AM · #16

Originally posted by good_ham:

Also, some of us don't have a lens that opens to f/2.1. I would think a smaller aperature would be a safer bet. f/8 perhaps?

okay we can go to F/8... But that is my camera's max... So lets shoot for F/8 ISO400 and a shutter time of 2 seconds, The ISO200 4" and ISO100 8".
Is that good???

06/02/2007 12:40:02 AM · #17

Originally posted by Lowcivicman99:

okay we can go to F/8... But that is my camera's max... So lets shoot for F/8 ISO400 and a shutter time of 2 seconds, The ISO200 4" and ISO100 8".
Is that good???

Yup, but make sure to frame the shots identically. And post 100% crops of the image(s).

06/02/2007 12:41:15 AM · #18

Originally posted by SamDoe1:

Originally posted by RainMotorsports:
It got reshot.

In the pictures posted above, the ISO100 and ISO300 images have the exact same framing. The ISO400 image, however, seems to be a closer view of the same thing (there is no wall on the left side).

As i said it got reshot lol.

Tamron SP AF 17-50mm f/2.8 Di II LD Aspherical (IF) for Nikon

06/02/2007 12:41:33 AM · #19

Originally posted by SamDoe1:

Originally posted by Lowcivicman99:

okay we can go to F/8... But that is my camera's max... So lets shoot for F/8 ISO400 and a shutter time of 2 seconds, The ISO200 4" and ISO100 8".
Is that good???

Yup, but make sure to frame the shots identically. And post 100% crops of the image(s).

Okay I did, how do I do a 100% crop?

levyj413

Apple iPhone 15 Pro Max

06/02/2007 12:53:45 AM · #20

Originally posted by Lowcivicman99:

Okay I did, how do I do a 100% crop?

Don't resize the image. Instead, crop out an 800 x 600 chunk.

MattO

Nikon D4

Nikon AF-S Nikkor 70-200mm f/2.8G ED VR II

06/02/2007 12:54:18 AM · #21

When you get that Sony up to 3200 ISO compare it to this one and let me know how it holds up OK.

:D

MattO

06/02/2007 12:57:58 AM · #22

Originally posted by levyj413:

Originally posted by Lowcivicman99:
Okay I did, how do I do a 100% crop?

Don't resize the image. Instead, crop out an 800 x 600 chunk.

I figured it out but I did 640x480 instead, sorry I saw this after I already cropped them all

06/02/2007 12:59:33 AM · #23

Originally posted by MattO:

When you get that Sony up to 3200 ISO compare it to this one and let me know how it holds up OK.

:D

MattO

ISO 400 is all she's got captian... I just don't have the powllllllllllllllll