CHDK on SD4000/IXUS 300 HS - page 7 - General Help and Assistance on using CHDK stable releases - CHDK Forum supplierdeeply

CHDK on SD4000/IXUS 300 HS

  • 79 Replies
  • 9161 Views
Re: CHDK on SD4000/IXUS 300 HS
« Reply #60 on: 02 / September / 2017, 19:50:04 »
Advertisements
Patch won't show up in the autobuild until tomorrow.
It's there!

Awesome, just f-ing awesome :lol :lol :lol

This is now a professional tool, complete stuff. Also, I noticed that Auto ISO with Slow Sync Flash produces best looking exposures. Set 50mm f4, set max A-ISO 800 or 1600 and you can shoot in almost all reasonable situations, sometimes with DSLR-like quality. And it fits every pocket, you could wear children's clothes and it would still fit your pocket.

As I called it... wise man's mirrorless  8)

Here's a 3:2 framing box, I like it even more. Just override with strong color.

Thanks for everything!

Re: CHDK on SD4000/IXUS 300 HS
« Reply #61 on: 02 / September / 2017, 19:56:33 »
Here's a 3:2 framing box, I like it even more. Just override with strong color.
I just knew we would eventually get you addicted.

Quote
Thanks for everything!
You are most welcome.
Ported :   A1200    SD940   G10    Powershot N    G16

*

Offline hwntw

  • ***
  • 158
Re: CHDK on SD4000/IXUS 300 HS
« Reply #62 on: 03 / September / 2017, 05:24:05 »
Thanks for that, I might try this in a spreadsheet where I can use functions on the table of numbers and export as CSV. Or, can the CHDK code include an arithmetic function which shifts the grids on an Ixus 300 HS?
The most useful grid for composition is the Diagonal IMO.

PS It is very quiet on this forum!
Ixus 300HS S100


Windows 10

Re: CHDK on SD4000/IXUS 300 HS
« Reply #63 on: 03 / September / 2017, 08:49:12 »
Here's a 3:2 framing box, I like it even more. Just override with strong color.
I just knew we would eventually get you addicted.

Quote
Thanks for everything!

You are most welcome.

Well, you managed to squash my initial skepticism about fixing all this stuff in a heroic manner :D

I'm not touching my settings anymore, but I need one more piece of advice. It concerns the lens, though.
We all know that compact lenses display a lot of sample variation, so I'm not sure if I should waste time & money by addressing a Canon repair center about the lens softness I'm seeing at wider apertures and shorter focal lengths. Is there such a thing as "lens calibration" for compact cameras? Could this be a "simple" focusing issue at short focal lengths?
I figured out how to get the best out of my copy of SD4000, but I'm still puzzled by some review samples which display very different behavior from my camera. It seems that my copy is far from the best...

For example, this Photographyblog sample is shot at f2. My SD4000 looks like "mush" at 100% wide-open, even at screen size the image appears soft. And even at f4 softness doesn't go away at 28mm. This sample, however, is closer to S95 shot.
http://img.photographyblog.com/reviews/canon_ixus_300_hs/sample_images/canon_ixus_300_hs_32.jpg

On the other hand, at Imaging resource I found this sample which reminds me of my camera. Perhaps the softness is due to DoF, but the overall appearance and the quality of detail makes me feel this is shot with my SD4000. Notice the softness in all distant objects.
http://www.imaging-resource.com/PRODS/SD4000IS/FULLRES/YIMG_0137.JPG

This f2 sample from Dpreview is also what I'd expect from my camera:
https://2.img-dpreview.com/files/p/TS2736x3648~sample_galleries/1178552919/5974056748.jpg

Then again, at Cameralabs, we have this sample taken at f2.8 in P mode, and I'm thinking to myself, there is no way my SD4000 would be this sharp at f2.8. Even the focus is close, probably on the big red thing, but the background is still decently sharp. Light and contrast are good though, so that helps.
https://c1.staticflickr.com/5/4104/5007050180_682ed1fa2b_o.jpg

Most probably, I won't mess around with the camera anymore and will just shoot it the way I think it's best. I know exactly how to set up things to get the most out of every situation. But I expected the lens to be sharpest between f2 and f4, which is quite usual for compacts, not at f7.1, being the case for all focal lengths except around 50mm. In high contrast scenes I can get some sharpness at f2, otherwise it's pretty soft. SD4000 has a good ND filter so shooting at widest apertures wouldn't be a problem in daylight. So, I guess my advice about shooting at 50mm f4 applies only to my copy...

Here's a couple of 100% crops which illustrate the issue. One is P mode f2.8 SOOC JPEG, the other CHDK DNG in Av, f7.1. Processing increased both detail and noise, but this image would be almost 40x27 in or 100x66 cm in size and thus viewed from at least 1.5m distance. Both images are shot at 28mm. Lighting is poor, so this is one of the worst case scenarios in daylight.

In general, my SD4000 has quite bad performance at wide-angle. I hear this is often the case with Canon compacts. Perhaps Canon gave out the best copies to the reviewers. Is it even reasonable to expect excellent wide-open performance at wide angle in such a tiny lens? It's significantly smaller than S95 lens.

Sorry for the long post ;)


Re: CHDK on SD4000/IXUS 300 HS
« Reply #64 on: 03 / September / 2017, 15:04:09 »
The good news is that in real life scenarios everything looks much, much better. Subjects up to 2 meters appear quite sharp even at f2, so if you compose the image carefully you can make any kind of softness look like "bokeh", an aesthetic aspect of your image. I actually shot some indoor and outdoor events at f2 containing distant subjects and the images looked pretty good, particularly in small size, which is the way most documentary photos are viewed today - on smartphones! In all but poorest lighting, it's possible to use 50mm f4 ISO800, or 1600, thanks to image stabilization, and then the lens really shines. In the end, it all comes down to the composition and atmosphere, the meaning of the image, so test shots naturally look bad because they are completely meaningless...

I'm just curios if anyone has experience with repairing Canon compact lenses - should I get into this? I'm guessing if they take the camera at all, they will probably tell me that softness is within "margin of error" :haha This happened with cheap Nikon 55-200 VR with obvious decentering: the repair center told me this is within "margin of error" for this lens, so they didn't fix anything. Bullsh**. :P
« Last Edit: 03 / September / 2017, 15:29:40 by Robert1975 »

Re: CHDK on SD4000/IXUS 300 HS
« Reply #65 on: 03 / September / 2017, 15:19:48 »
I'm just curios if anyone has experience with repairing Canon compact lenses - should I get into this?
I'm betting the minimum charge to look at your camera will be a lot more than just buying a couple of ixus300's on eBay and seeing if you get lucky?  Resell the camera(s) if not - you might even make a little profit if you are careful about how you list.
Ported :   A1200    SD940   G10    Powershot N    G16

Re: CHDK on SD4000/IXUS 300 HS
« Reply #66 on: 03 / September / 2017, 16:21:30 »
My thoughts exactly.

It's sad there are so many sample variations, even the samples on renowned photography sites are inconsistent. This camera had a quite high RRP particularly in UK & Europe - you would expect more quality control for that kind of money. But under $100 I don't care :lol I found one for like $60 in local ads, I asked the seller if he could provide f2 samples, landscape, open-air, etc.

But somehow I think I'll stick to SD4000 I already own, and my best settings/LR presets. All this experimentation is driving me away from what I really want to do with the camera, and that is PHOTOGRAPHY. Shooting images. :)

Re: CHDK on SD4000/IXUS 300 HS
« Reply #67 on: 03 / September / 2017, 16:51:31 »
Thanks for that, I might try this in a spreadsheet where I can use functions on the table of numbers and export as CSV.
Attached.

Quote
Or, can the CHDK code include an arithmetic function which shifts the grids on an Ixus 300 HS?
I think so. See my post here
Ported :   A1200    SD940   G10    Powershot N    G16


Re: CHDK on SD4000/IXUS 300 HS
« Reply #68 on: 03 / September / 2017, 19:58:08 »
I've just figured out what to do. Instead of constantly trying to emulate my DSLRs with SD4000, I'd simply use the lens faults in a creative manner. I did some vintage presets, color, B&W, which make the softer f2 images look "right", sort of analogue. And not only those. Collecting old IXUS cameras in the hope that some of them will be "very sharp" is ridiculous if one already has ridiculously sharp DSLR which is not THAT difficult to carry.

I can always stick to 50mm f4 in good light if I want DSLR-like quality, but I can also shoot f2 on purpose to get a different, original look. Then downsample to 6MP to get small 3-4MB RAWs. Instead of over-sharpened, over-saturated smartphone images, or realistic DSLR images, people would be pleased to see something "imperfect", reminiscent of past. It's actually quite liberating! This is the purpose of a pocket camera with professional capabilities. To get something different. Maybe I'll do 5:4 framing box.

But it has to be done purposefully, not in a hipster-like Instagram manner only for the sake of "doing it" :lol

Re: CHDK on SD4000/IXUS 300 HS
« Reply #69 on: 04 / September / 2017, 08:42:03 »
Here's the 5:4 grid for SD4000 - it's just two vertical lines, very precise. 5:4 format is very elegant, considered "professional". I have no way of framing images in 5:4 on my DSLRs, but I can do it now on SD4000! How ironical. I actually like this aspect ratio for numerous aesthetic/geometrical reasons.

I talked to the seller about his SD4000 and it turned out it performs similarly at f2, if not worse. It seems that many copies suffer from this problem - it's obviously a trade-off for the real iris in a tiny pocketable body. Maybe I should ask the guys from photographyblog about the copy they used for the review, it's obviously a very rare copy. :lol

But as I said, f2 shots look excellent on mobile devices and in 6x4 prints, even on desktop monitors when composed & processed carefully, so I'm OK with this... At least I can take this camera with me anytime and literally forget about it, which is NOT the case with the latest smartphones or "phablets".

 

Related Topics