Showing posts with label canon. Show all posts
Showing posts with label canon. Show all posts

Photography - New (to me) Canon EOS 20D camera

My new camera is a lot like my old camera in so far as they both take pictures, and they are both 8 megapixel cameras.

But after that they diverge a bit.

The Sanyo Xacti that I've been using for the last 1300 photos I've taken was gifted at me by someone (Thanks anonymous company) when I really needed a replacement because all the point and shoot digital cameras I've bought to make this blog (I think it's 3 now) fall over just after 5000 happy snaps.

5000 seems like a lot when I put it in print, but in terms of time, that equates to less than a year per camera.  Sure they cost less than AU$100, but I still want more than a year out of anything I buy.

This one that I've been using is still going strong, and does a pretty good job of it I suppose, but I found the interface very heavy going.

It has quite a few options and features, but all of them have to be accessed via a clunky multi-level menu system. That means that every time you want to do anything other than what it's set to do now, you have to explore a stack of menus to finally find what you need, and by the time you've found it, the ladybird has finished eating it's aphid, and flown away.

My new camera on the other hand is a zillion times better to work with. I've only had it for around 10 hours, but it already feels comfortable.

It's taken around 1200 pictures so far in it's life.

I have very greasy fingers.

I'm eating zucchini and haloumi fritters.

Delicious.


The new camera is a Canon 20D. It was originally sold for around AU$1500 (Australian dollar) in 2004, and was described as a "semi-professional" or "prosumer" camera at the time, which of course means substantially more than other imaginary words and their associated imaginary metrics.

But on the whole, the camera rocks.

That's my official rating out of 5.

It has a 4 GB CF memory card, which is the size of a bulky circa 2012 64GB mp3 player, and that cost around the same as a bulky circa 2012 64GB mp3 player. It takes a while to transfer photos, but it has very nice functionality, and best of all has an interface that works.

It also comes with some nice lumps of glass in the lens. It seems to be the lens that lets down lots of little point and shoot cameras. The quality of the photo's taken by my new 8 megapixel camera is a lot better than those I've taken with an 8 megapixel point and shoot style camera.

The second lens feels a bit like it might blow away, but at $10 it's a very nice thing to have around.

The camera came with a Canon 18-55mm f3.5 image lens, with image stabalizer. I've just discovered I love image stabalizing. Image stabalizing allows you to be a bit shakey, and have the lens do some stuff to fix it.

As I understand it, there are exactly two ways to do image stabilizing.

  • 1. Project an image onto the censor, so that the image is a little larger than the censor, and the image has some extra image in the margins. Then have the camera track your shakey projection, and then use magic or software or something to knit together a nice crisp image.
  • 2. Track some points on the image, and move the lens around a bit so that any given point on the censor always sees the same bit of the image, or move the censor to achieve the same thing.
  • 3. Use gyroscopes mounted on at least two axes to resist the movement of the entire camera. Things spinning around like to keep doing it. If you take the tire off your bike (stop first) and hold the axle while someone else spins it as fast as they can, it becomes difficult to change the angle it's on. This is why a spinning top (do they still have those?) stays upright, and is simply due to the universe being an amazing place.
Amazing!

The camera shows its age through it's 8 megapixelness, as at the time of writing, that's about 16 megapixels short of where it should be.

I bought it from a second hand camera store in Japan for $150 with the Canon 18-55mm zoom, and I got the second lens, a Tamron 100-300 zoom, for $10 from the bargain bin.

Thanks Tom.

Tom's a friend of mine.

He's really good at buying way too much camera gear from junk bins. His hobby includes buying those instamatic film cameras that were big in the 70s. He likes to buy them when they have rolls of film still in them so he can process the film. In some subtle way, that's slightly different from buying some old photos.

Which is nice.

For him.

He's kind of a time traveller, but he only gets to look, and doesn't get to choose what he looks at.

Mostly he gets to look at darkness.

Sometimes darkness, but with slightly mouldy edges.

Luckily, I don't suffer from collecting things other than my collection of odd people I know.

Tom's one of my favourites.

Thanks Tom.




120 Things in 20 years - One of the best parts about getting my new, second hand Canon 20D camera, was getting to look at the Japanese supermarket junkmail it was packed in. It's been 20 years since I was in Japan, and the junkmail paper is now of even better quality.


Photography - Camera hacking


I've bought a new camera!

But more importantly for right now, my old camera didn't focus any more, so I thought I might pull it to bits to see if I could fix it.

A camera hack if you like.

Well it's hacked now.

But in the process of attempting to fix it, I thought it might be grit or something stuck in the focus gears. I figured I might be able to override the emergency shutdown on lens fail, and just use brute force to get past the grit.

But before pulling it apart I thought I'd look for a software hack to manually focus the thing. It's a Canon Powershot A490 point and shoot (or at least it was), so it doesnt normally have manual focus.

I found much more than a focus hack, but also much less.

Much less in that I still couldn't do manual focus, but so very much more in that I found CHDK - Canon Hack Development Kit.

CHDK is amazing. It's a kit full of files that you install onto your SD memory card, put it into your camera, then use the update firmware option (only seen on my camera when the CHDK is on the card) of your camera to install all the new functionality. It does things like...

  • motion detection
  • increment focus to automate focus/photo stacking as mentioned in the previous post
  • depth of field calculator
  • exposures from 2048s to 1/60,000s with flash sync
  • change the layout and visibility of you on screen display info
  • etc etc etc (so much more)
Look here to see a slightly bigger list, but still not all of it.

And here for the manual which covers more.

But even more can be found on the forum in the form of scripts that can be loaded into your camera. There are scripts that do motion detection fast enough to catch lightning strikes. (less than 60ms I think it was - dont quote me)

So in spite of just buying a new camera, I'm off to see if the $20 camera I saw in the electronics shops bargain bin is a cannon powershot. 

120 Things in 20 years CHDK camera hack - Awesome. 

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