Michaelbyz23,

Initially I thought you were describing it as soft muffled chucking sound, which is very normal in IS lens, which has this sound increasingly in effect of its focal length. But I wasn't expecting such loud sound which sounds like glasses are in direct impact with the lens body(?). I only had Sigma 18-200mm OS that has OS and is Sigma. It does have noise when I shake, but doesn't sound like that. Similarly to my 70-200mm f4L IS, it is very loud, but does not sound worrying.

------
steven789,
IS should be off when you mount on tripod, unless it is the new generation of image-stabilized telephoto lens that does work on tripod for panning.

Theoretically you do not need IS on tripod.

But L gives very nice colour and the right amount of contrast. You can expect consistency in its image output.

EF-S lens is only designed for APS-C camera. Anything larger than that such as APS-H and full frame camera requires EF lens. 1D4 is a APS-H camera. EF-S lens have a notch with does not allow the user to mount it on APS-H and full frame.

Third party lens, no problem.

Today I saw a used 16-35L Mark I selling for 3800. Good price?

If I have tons of money extra, I will really get a 16-35L but it's just too expensive for me.

My FF transformation, haven't turn well yet. Lol..

Sounds good but we can't really judge when there is only little 60D for sale. There are chances that it would be even cheaper when every sellers have the stock.

You can correct by DPP. Your horizon offset is -1.31 degree. Try it

I am using 3.8.10. Update yours.

How can the viewfinder prism get scratched so easily? I once used to touch it so much from outside and inside the camera also no scratches (but focussing screen was badly scratched).

Oh, then I think it is the focussing screen right above the flipping mirror? That one can get scratched by any thing. Even microfiber cloth is too rough for it.

I got mine replaced in Canon for RM15 only.

Took 1 day (next day) for me. That time I have CPS.

---

Added on October 8, 2010, 10:04 pmIf your budget can spare for 550D, go for it. Otherwise buy 500D and better lens and also lighting set up. In macro photography, it is your set up and skills bring more important than minor difference in camera capability.

This post has been edited by mengsuan: Oct 8 2010, 10:04 PM

When someone touches the inside of camera while changing lens, the sensor is still being protected. What is exposed is just the mirror which does not affect anything.

---

Added on October 8, 2010, 10:40 pmThe photo is decent but isn't impressive. While many compacts offer super-macro kind of feature, DSLR usually require macro lens do shoot closely with high magnification. You will need to allocate some budget on macro lens or at least, close up filters or some sort of things.

I assume your macro photography are done in controlled environment. Why do you need a camera with better low-light performance? You will probably be having lights illuminating your subject very well.

But since you're considering deeply into 550D, I believe you do have the budget to spare. Get the 550D and you might find it useful for other usage as well.

This post has been edited by mengsuan: Oct 8 2010, 10:40 PM

Lol, ianho buy lens like buying fish in market. I believe he won't even buy Tamron 90mm. Buahaha

AlexLee277, I don't like the vignetting. Too strong.

Hey. Where? That 50L seller???

Wait- you mean you're going to buy 5D2?

This post has been edited by mengsuan: Oct 10 2010, 09:56 PM

The cheap 50L seller is now selling his 5D2: https://forum.lowyat.net/topic/1548683

Not exceptionally cheap but it is not bad.

Vincent, your friend still have 24L and 35L to sell or not? Regretted not grabbing it last time.

Lens tissue is effective in removing oil residues, possibly better than microfiber cloth, which is easily stained with your own finger oils before you even use to wipe the lens. However if you use lens tissue in cheapskate (keep on wiping without changing tissue) way, the tissue will break into lints and you will have to take all the trouble to clean again.

Hence shops don't sell lens tissue:
1. Professionals think lens tissue are cheapskate because they break into lints
2. Cheapskates still think lens tissue is expensive

But there is always market catering for professionals. You shall be looking for "Pec Pad". It is lint-free wipes, even Canon use something similar.

If you're shooting and processing in sRGB, there should be negligible change after uploading to flickr.