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DPChallenge Forums >> Individual Photograph Discussion >> How could I have gotten a sharper focus on these ?
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03/27/2007 01:38:45 PM · #1
I shot these this afternoon in our apartment.
All are using my D50, 18-55mm lens (I got a closer focus with that than with my 50mm prime lens), f8, 1/125, ISO 200.



Oh, and unless you are willing to send me a free macro lens, please don't suggest one. There is no way I can afford one at this time, or at any time in the foreseeable future. But, if you've got one you're ready to part with, I"ll gladly send my address of course *grin*

Okay - joking aside. I know the focus is off on these. I was holding the camera in hand, while my 4-yr old was trying to bump me away to play with the bug (not allowed, as that would end with the demise of the poor creature - instead it was released outside).
03/27/2007 01:41:20 PM · #2
Get a tripod, it will make the world of difference.

Mike

03/27/2007 01:43:07 PM · #3
You could have put them in a freezer, that allows for longer exposures...
03/27/2007 01:43:07 PM · #4
Originally posted by MikeOwens:

Get a tripod, it will make the world of difference.

Mike


Have a tripod.

I don't know that it would have helped while following a live bug around though.

And having to get very close to it to get a good focus.

Would it ?
03/27/2007 01:43:50 PM · #5
Originally posted by srdanz:

You could have put them in a freezer, that allows for longer exposures...


Umm - explain ?

And, is that something I REALLY want to show my 4-yr old ? With 2 younger children, a cat, and some fish around ?
03/27/2007 01:45:32 PM · #6
Not sure if this is what you were asking. Just reacting to your statement about the free macro lens. Cheap ways to get good macro photos, without buying a macro lens: 1) extenders. come in different sizes. 50mm of extension will give you about a 1:1 macro ratio (just like the macro lenses). I bought a set of Kenko ones for my canon for $150 (or less). 2) mount your 50mm lens backwards! I know this sounds crazy, but you can make a mount from a body cap and a macro adapter ring. PM me if you want more info. this is the cheapest way to get macro, but takes some handywork to craft the adapter. Also, you lose any control of aperture, etc. 3) mount your 50mm lens backward onto a longer focal length one. This is also very inexpensive (as long as you have another lens to mount too). This can give higher magnification ratios than 1:1. Extreme close-ups.

Steve
03/27/2007 01:46:28 PM · #7
A picture is worth a 1000 words...
\
ps. you can put the ladybug in a freezer beforehand, and just pull it out in front of them later, and show them how you set up your tripod, lighting , etc. That should get their attention...
03/27/2007 01:46:43 PM · #8
Originally posted by kashi:

Originally posted by MikeOwens:

Get a tripod, it will make the world of difference.

Mike


Have a tripod.

I don't know that it would have helped while following a live bug around though.

And having to get very close to it to get a good focus.

Would it ?


True but I did not realise they were live and running around did I!

If you put them in the fridge rather than the freezer this will slow their metabolism down, make them dopey and they should stay still long enough for you to get your photos.

03/27/2007 01:47:10 PM · #9
Shooting macros is best done from a tripod. This is due to the shallow dof and with a tripod you have much more control and better chance of a steady camera. Using a remote shutter release would help even more.

If you want to go to the extreme you could even use mirror lockup to avoid any shake caused by the mirror slap.

If the above suggestions are not an option then using a faster shutter speed could help. Though adjustments to the ISO, aperture are the amount of light on the bug would have to be made to compensate.
03/27/2007 01:48:08 PM · #10
Are these 100% of the original shot or are the a very tight crop from the original?
03/27/2007 01:52:41 PM · #11
Originally posted by error99:

Are these 100% of the original shot or are the a very tight crop from the original?


Tight crop from original.
03/27/2007 02:04:17 PM · #12
Originally posted by kashi:

Originally posted by error99:

Are these 100% of the original shot or are the a very tight crop from the original?


Tight crop from original.


That's most of the problem then. Think of it this way... You have a 6 megapix camera but the main subject of the shot it only utilizing 1/5th of that. You crop it tight and have, in essence, taken a shot that equals 1.2ish megapix. Macro lenses work by allowing you to fill the frame with the small subject thus using the full 6 megapix, increasing resolution and all that other mumbo jumbo. :) That's an over simplified hypothesis of what I think is going on, but, hopefully I got my point across. Extension tubes or macro filters on your 50mm would be a cheap alternative to a macro lens and should yield better results than what you're trying here.

Message edited by author 2007-03-27 14:04:58.
03/27/2007 02:17:24 PM · #13
Originally posted by error99:

That's most of the problem then. Think of it this way... You have a 6 megapix camera but the main subject of the shot it only utilizing 1/5th of that. You crop it tight and have, in essence, taken a shot that equals 1.2ish megapix. Macro lenses work by allowing you to fill the frame with the small subject thus using the full 6 megapix, increasing resolution and all that other mumbo jumbo. :) That's an over simplified hypothesis of what I think is going on, but, hopefully I got my point across. Extension tubes or macro filters on your 50mm would be a cheap alternative to a macro lens and should yield better results than what you're trying here.


Actually that makes sense to me.
03/27/2007 02:23:39 PM · #14
As brownsm posted, try reversing the 50mm lens on the 18-55. you can do this with a very inexpensive "macro coupler". Both of these lenses have a 52mm filter thread, so you would need a 52mmm-52mm coupler. They are under $10.
Now, once you've got the 50mm reversed on the 18-55, set the 18-55 to the long end (55mm) and test your focus. You'll need to get quite close, and there will only be a narrow range in which you can achieve focus. Yoiu will retain aperture control of the 18-55, so you'll still have control of DoF. Your DoF at these high magnifications will be very narrow, even at very small aperture.
The above is the least expensive way to get high magnification for insect (and other) macros. The second-least expensive is the Canon 250D. This is a high-quality two-element "diopter" and runs about $70. Still cheaper than extension tubes, and a good bet for macro on the cheap.
03/27/2007 02:51:22 PM · #15
This thread is just another example of how helpful DPC can be. Thanks, everyone! I'm gonna keep on my watched list for whenever I finally get an SLR. :)
03/27/2007 03:00:01 PM · #16
Will that Canon 250D fit on the Nikon lens ?

I mean - 52mm is 52mm, right ?
03/27/2007 03:14:31 PM · #17
Originally posted by kashi:

Will that Canon 250D fit on the Nikon lens ?

I mean - 52mm is 52mm, right ?


The Canon 250D is like a filter so you can use it on any lens that has the correct size filter threads.
03/27/2007 03:14:54 PM · #18
Originally posted by kashi:

I shot these this afternoon in our apartment .... using my D50, 18-55mm lens (I got a closer focus with that than with my 50mm prime lens), f8, 1/125, ISO 200.



... joking aside. I know the focus is off on these. I was holding the camera in hand, while my 4-yr old was trying to bump me away to play with the bug (not allowed, as that would end with the demise of the poor creature - instead it was released outside).

Here is my take...

Given the camera settings listed on the images I would say that using a tripod and/or shortening exposure times is not the issue.

The images have that 'oversharpened but not really sharp' look often seen on DPC submissions. This is usually either caused by equipment, oversharpening and/or over cropping the image.

I suggest that it might be a combination of one or more of these issues. My suspicion is that you are trying to achieve a 'macro' result from a non-macro lense and compounding it with either a small crop or post processsing sharpening... probably both.
03/27/2007 03:18:05 PM · #19


50mm prime reversed in front of Sigma 70-300. No cropping. Why don't you get one of those? Only around $190, great range and a 1:2 macro. Much better than dropping $70 on a diopter.

Harry

Message edited by author 2007-03-27 15:22:32.
03/27/2007 03:20:52 PM · #20
Grrr. Why isn't this showing? It's in my portfolio, anyway. DSC_1007 if you wanna take a look...
03/27/2007 03:21:51 PM · #21
Try brighter lighting so you can go higher on the f-stop and the speed. When you're working macro, it's really hard to get ALL of the picture in focus. The higher you can go with the f-stop, the clearer everything in the picture is going to be.
03/27/2007 03:23:29 PM · #22
Originally posted by hsolakidis:



50mm prime reversed in front of Sigma 70-300. No cropping. Why don't you get one of those? Only around $190, great range and a 1:2 macro. Much better than dropping $70 on a diopter.

Harry


Fixed the link for you.....
03/27/2007 03:24:21 PM · #23
I agree with Steve. I don't think your shots are OOF. They are oversharp and I think you are merely running into the limitations of the lens and sensor (ie. how much you need to crop).



This was taken with a non-macro lens and you can see that even with L-glass, the quality is limited due to the required crop to get a decent size. (and this isn't even close to as extreme a crop as yours).

03/27/2007 03:26:16 PM · #24
Here are some examples of what a reversed 55mm f/1.8 lens can do on a basic 5MP, 3x optical zoom Point & Shoot.

30 Day Macro Challenge

I am actually on the look out for a reversing ring to mount my Nikon 50mm to my D200, they are just a bit tricky to find down here though... I had to make the one for my Sony out of two Cokin P filter adapter rings.
03/27/2007 03:28:49 PM · #25
Raziel, how's that?
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