Eos 400d ( Rebel XTI ) - page 19 - DSLR Hack development - CHDK Forum
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Eos 400d ( Rebel XTI )

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Offline frogcement

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Re: Eos 400d ( Rebel XTI )
« Reply #180 on: 06 / September / 2009, 16:28:25 »
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Quote from: thaibv on 04 / September / 2009, 11:13:10
Hi frogcement,

If you set iso 80 and increase manualy back to 0, yours image will overexposed.

When set iso 16, Av will auto down to -3, and at iso 16 image will too too bright, loss details if increase Av comp to 0.

Great, thanks for the info. I don't see any improvement below ISO 80.
And it might just be wishful thinking that ISO 80 is better than ISO100.
Another question. What exactly does the testfir.fir do? I assume it's just an add on to the current loaded firware, correct? Where can I find the source code for testfir.fir?
Thanks,
Keith
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Keith
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Offline paten

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Re: Eos 400d ( Rebel XTI )
« Reply #181 on: 10 / September / 2009, 14:09:48 »
spot metering is very valuable for my 400D thx a million for this one :D

btw my ReleaseCount is: 66625

i can't believe it's above 50.000 0_0 and still alive :D *hopefully...
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Offline thaibv

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  • Canon 400d: Spot, ISO 3200 and more
Re: Eos 400d ( Rebel XTI )
« Reply #182 on: 13 / September / 2009, 08:31:49 »
Hi,

Just uploaded new file here: http://code.google.com/p/400d/downloads/list
New:
- Focus point Pattern mode light illumination
- Corrected bug: display off when exit menu or Picture viewer mode if enter Menu or Picture viewer while Pattern dialog on.

Edit: name of bin file now added release date. Please rename to AUTOEXEC.BIN after copy to CF card.
« Last Edit: 13 / September / 2009, 08:50:21 by thaibv »
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Offline ahoffmannphotography

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Re: Eos 400d ( Rebel XTI )
« Reply #183 on: 13 / September / 2009, 15:06:28 »
hi guys quick question,
  normally when you increase the ISO, the file size goes up.
 i.e the same picture at 1600 vs 100 ISO will be much larger. This then results in the remaining free space picture count to go down when you increase the ISO, yet this is not true when I switch from ISO 1600 to lets say ISO 3200. In fact the remaining number of pictures goes up. But when I download the image, the ISO 3200 is actually about 1mb bigger than the ISO 1600 picture.
   I also noticed that the file size under ISO 100 doesn't change.
   In compared all the images at all possible ISO and noticed that all ISOs under 100 dont make a difference. In my opinion this option is unnecessary and I think we should be looking at other things to change, not lowering the ISO.

 Anyways amazing jobs guys, you just made my old 400d 10 times better!!!!!! Thanks!!!!!!!
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Offline maiohwmai

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Re: Eos 400d ( Rebel XTI )
« Reply #184 on: 14 / September / 2009, 05:56:05 »
thaibv:

actually i found it's quite easy to active the hidden iso value.
i tried to set the hidden iso value (even they are not listed in menu) with PC software based on EDSDK,
it works fine. no firmware modification required.
i've tesed 350d with iso from 6 - 3200, all iso <= 1600 are worked, but 3200 not.
i guess some firmware hack is needed to extend the high iso.

i'm keep working with 350d.
cheers!
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Offline fsnfs

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Re: Eos 400d ( Rebel XTI )
« Reply #185 on: 15 / September / 2009, 05:01:31 »
I have found that 400D flash light sync. speed is not 1/200; it is ok while 1/250, can crack it?


Quote from: thaibv on 13 / September / 2009, 08:31:49
Hi,

Just uploaded new file here: http://code.google.com/p/400d/downloads/list
New:
- Focus point Pattern mode light illumination
- Corrected bug: display off when exit menu or Picture viewer mode if enter Menu or Picture viewer while Pattern dialog on.

Edit: name of bin file now added release date. Please rename to AUTOEXEC.BIN after copy to CF card.
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Offline Zibri

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Re: Eos 400d ( Rebel XTI )
« Reply #186 on: 15 / September / 2009, 11:21:52 »
Quote from: ahoffmannphotography on 13 / September / 2009, 15:06:28
hi guys quick question,
  normally when you increase the ISO, the file size goes up.

Well.. the size goes up because higher iso values have more noise and noise is much more difficult to compress.
At low ISOs the noise is almost absent so the size won't change a bit.
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Offline T.B.

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Re: Eos 400d ( Rebel XTI )
« Reply #187 on: 16 / September / 2009, 08:56:05 »
Yes - but the remaining pictures goes up, if you use ISO 3200 or 2000 instead of 1600....
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Offline sadiesdad

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Re: Eos 400d ( Rebel XTI )
« Reply #188 on: 16 / September / 2009, 15:11:27 »
Hi,

Just uploaded new file here: http://code.google.com/p/400d/downloads/list
New:
- Focus point Pattern mode light illumination
- Corrected bug: display off when exit menu or Picture viewer mode if enter Menu or Picture viewer while Pattern dialog on.

Edit: name of bin file now added release date. Please rename to AUTOEXEC.BIN after copy to CF card.

Now what exactly does this do? i have loaded it, but do not seem to notice any difference.
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Offline fsnfs

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Re: Eos 400d ( Rebel XTI )
« Reply #189 on: 17 / September / 2009, 04:30:17 »
anyone notice the flash light limite is not 1/200 it can up to 1/250 ?
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