Eos 400d ( Rebel XTI )

Sergei

If anybody's interested in autoiso, here is another autoexec:
http://www.filefactory.com/file/a19a8ah/n/autoexec_autoiso_20100112.zip
Minimum shutter speed can be set from Tv or M modes. Shutter speed in those modes will be minimum set point for Av and P (after switch from M or Tv to Av or P). And maximum speed will be minimum + 2/3 .

lorenzo353

Sergei,

please, do you know the memory layout of the 400D ?

Lorenzo

Sergei

I don't

sergey07

darthvedor

sergey07
I have a slight problem, I use 2 CF cards now. and I both formatted them when I bought the new one, so I lost functionality of the hack. Now, when I made the Cf bootable and put in the new autoexec.bin, the camera does not work with that CF, while it works with the newly formatted one. What do I do to put back the hack?

Check the size of the CF. The instructions for 4GB (fat16) and > 4GB (fat32) Cards differ, just incase u may have missed that part.

Thast's where I'm having my problem, I followed the instructions because my new card is a sandisk extreme 4gb. But the program specified doesn't make the cf bootable...

xxxpongxxx

you dont need it to be bootable, just do the editing that is indicated

Ant

Please, can anybody upload here FlashROM dump for 400D, wich working with 'autoiso' hack ?

sadiesdad

Sergei
If anybody's interested in autoiso, here is another autoexec:
http://www.filefactory.com/file/a19a8ah/n/autoexec_autoiso_20100112.zip
Minimum shutter speed can be set from Tv or M modes. Shutter speed in those modes will be minimum set point for Av and P (after switch from M or Tv to Av or P). And maximum speed will be minimum + 2/3 .

What does this actually mean?
Do you need to got to M or TV first for auto iso to work, and how do you turn auto iso off if not needed? ???

Sergei

You will need to go in M or Tv modes only if you want to change lowest shutter speed in auto iso. Software in the camera saves shutter speed value from M,Tv in memory. It will be in memory even if camera is off. Auto iso will read that value and use it as set point.
To turn off auto iso set "shoot without CF" to OFF.

obitus

Sergei
You will need to go in M or Tv modes only if you want to change lowest shutter speed in auto iso. Software in the camera saves shutter speed value from M,Tv in memory. It will be in memory even if camera is off. Auto iso will read that value and use it as set point.
To turn off auto iso set "shoot without CF" to OFF.

Hello, you guys are great! This is what I always wanted with my beloved 400D!! Auto-ISO!

Now, what is the difference between the Auto ISO version of 2010-01-08 and 2010-01-12? Both work for me.
Does the Auto-ISO take into account the focal length?
One remark: to turn back on Auto-ISO, I need to set "shoot without CF" to ON and then switch AV-TV-AV then it works again.

Sergei

obitus
Does the Auto-ISO take into account the focal length?

It doesn't. I didn't find where firmware stores focal length.
In Auto-ISO v.2010-01-08 shuttter speed was set to 100-200 and can't be changed. In v.2010-01-12 you can set lowest shutter speed to any value.

Gull_Code

did you updater the code on google.code, or can you provide it ?

obitus

Hello,
I just wanted to say that the Auto ISO is fantastic, works great, even with the new ISO values like 3200 or 1000! Being able to store the minumum shutter value is great.
One idea: could it be possible to set a maximum ISO value? Difficult to store that value, I imagine though.

Sergei

obitus
One idea: could it be possible to set a maximum ISO value?

AUTOEXEC.BIN and sources:
http://www.filefactory.com/file/a2d2eg8/n/autoexec_autoiso_2010-01-20.rar
Same as 2010-01-12, but for maximum ISO value it will look in User Def. 3 Sharpness setting. So maximum ISO will be: sharpness value * 1/3 stop + lowest shutter set point.

Thanks to mrc67.

mrc67
I noticed few places where to store settings (in example autoiso in "Shot without CF", Auto Adjust Exposure in PAL/NTSC video format)
Couldn't be useful to destiny the last picture style User3 to store settings?
This way you could store 4 settings also with multiple values.

Gull_Code
did you updater the code on google.code, or can you provide it ?

I don't think i can update existing project for 400d on code.google.com

djs

Hello
First, sorry for my bad english (i'm french)
Congratulation for your job on 400D firmware, it's simply excellent !
Juste one question for me : How can i Set maximum ISO for the auto ISO mode. I d'ont understand : "So maximum ISO will be: sharpness value * 1/3 stop + lowest shutter set point."
What is "1/3 stop" ?
Why don't set fixed ISO value for each sharpness value ?
ex :
0 : 200
1 : 400
2 : 500
3 : 640
4 : 800
5 : 1600
6 : 2400
7 : 3200

Thanks you

EDIT :

And for value of CONTRAST, why don't set shutter speed

ex:
0 : = Tv or M mode
1 : = focal length
2 : focal length / 1.5
3 : focal length / 2
4 : focal length / 3
5 : focal length / 4
6 : focal length / 8
7 : focal length * 2

drinian

Hi, MANY THANKS for your awesome work on the firmware! It really helps me take better photographs, especially spot metering is very useful.

I have got a problem that is a bit specific: I own a used Sigma 400mm f5.6 APO Telemacro which - due to a change in the Canon EF protocol - won't work with any other aperture than 5.6 on recent EOS cameras. This is the case with several older Sigma lenses.
I heard that this is due to some command sent from the body is not answered by the lens.
This leads to an Err99 at apertures higher than 5.6. The optical quality of the lens is outstanding (some say it's even better than the Canon 400mm f5.6), so I would really like to be able to work with all aperture settings.

Would it be possible to alter the firmware so it won't check the answer to this command?

Sergei

djs
Juste one question for me : How can i Set maximum ISO for the auto ISO mode. I d'ont understand : "So maximum ISO will be: sharpness value * 1/3 stop + lowest shutter set point."
What is "1/3 stop" ?

Oh! It's my fault. I meant: " for maximum shutter speed set point it will look in User Def. 3 Sharpness setting. So maximum shutter will be: sharpness value * 1/3 stop + lowest shutter set point. ".
The sharpness value in User Def. 3 is how many times program will increase lowest shutter speed to next higher value to calculate max shutter set point.
Example:
If minimum shutter is 100 and sharpness is 2 the max shutter will be 160.
If minimum shutter is 200 and sharpness is 2 the max shutter will be 320.
If minimum shutter is 400 and sharpness is 3 the max shutter will be 800.

I will work on maximum ISO value when i will have time.

djs

So maximum ISO cannot be set ???
3200 ISO is bad for noise and quality image. I think maximum ISO set to 800 is a good idea.
I wiil try to modify main.c and recompile it but i have errors.
What your GNU ARM compiler ?
Thanks you

Sergei

http://www.filefactory.com/file/a2d83hf/n/autoexec_autoiso_2010-01-21.zip
To set maximum ISO, change contract and saturation values in User3.
Contrast values:
-1 100
0 200
1 400
2 800
3 1600
4 3200
Use saturation values from 0 to 4 to set how many times you want to increase main ISO to the next higher value.
Example: contrast 2 and saturation 1 will set ISO 1000.
Then switch to Tv or M mode and back to Av or P. You will see your max ISO as ISO value.

djs

Oh yes !
Thanks you a lot for this release 😀

No way for add focal length in auto ISO calcul ?
Can I help you (to find focal var or other ?)

BR

obitus

Sergei
http://www.filefactory.com/file/a2d83hf/n/autoexec_autoiso_2010-01-21.zip
To set maximum ISO, change contract and saturation values in User3.
Contrast values:
-1 100
0 200
1 400
2 800
3 1600
4 3200
Use saturation values from 0 to 4 to set how many times you want to increase main ISO to the next higher value.
Example: contrast 2 and saturation 1 will set ISO 1000.
Then switch to Tv or M mode and back to Av or P. You will see your max ISO as ISO value.

Hello Sergey,
thanks for this release and your efforts.

I tested this release and did as you wrote. I set Max ISO to 800 for example (Contrast = 2, Saturation = 0), went to P, back to Av. Display showed ISO 800. Then I metered on something bright, ISO on display switched to ISO 100 as it should. But when I take the photo, it shows ISO 800 in the review. I think the saved ISO is wrong though (versus the real ISO of the picture), since the shutter speed and aperture in the saved photo are as metered just before taking the picture, only the ISO is at 100. But if ISO were really 800, to photo would have been overexposed.
When I meter on something dark, ISO does not go beyond 800, so this part works.
I hope this can be of any help.

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