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08/27/2005 08:03:17 AM · #1 |
| Im wondering if there is a limit to how many macro magnifications you should use if using multiple lenses. Ive got a +1,+2,+4 and +10 55mm screw in on the end of my normal lens. I can use them all together or seperately and I wonder are you meant to or is there a general rule to stick to +10? |
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08/27/2005 08:09:27 AM · #2 |
There's no general rule, except the rule that the more of them you stack, the more abberation you'll introduce. Where it gets to be enough to defeat the purpose is totally up to you. Judge by the results. It's not possible to generalize, ecause different add-on lenses (diopters) are of differing quality. Yor camera's optical system also plays a part.
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08/27/2005 10:53:46 AM · #3 |
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08/27/2005 12:03:15 PM · #4 |
Originally posted by kirbic:
Yor camera's optical system also plays a part. |
Fritz, someone just asked me this question: Can a 10x (or any) close up filter negatively affect the camera's internal focusing abilities at all?
I do not have good exact answer for that except that my auto focus seems to be challenged at times when I attempt to shoot in portrait or any angle from landscape. Of course, that might be 25,000+ shots 1.5 years old. Any ideas?
Thanks!
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08/27/2005 02:49:00 PM · #5 |
| I used some inexpensive magnifiers on my D70 in the past. At times I shot really good pics...others not so good. Seems like I had to shoot about 20 shots to get 1 good one with the mags. With my "real" macro lens I get really good shots "eaiser". |
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08/27/2005 02:57:07 PM · #6 |
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08/28/2005 11:22:11 AM · #7 |
I have heard that generally with macro shots, you don't want to use autofocus. It is usually best to set manual focus and move the camera around until you believe you have the right focal distance. Some cameras have focus bracketing. This is extremely useful, but the bracketing differences should be set carefully beforehand. I personally only use focus bracketing for macro shots, so I set the focus difference pretty close.
Macro techniques involve some very careful use of focus, so most guys prefer to have more control. Sometimes you might find that having the peak focal distance a little back of where you might expect will be beneficial. In other cases, a little forward might help to bring more of the subject into focus, while still retaining sharpness on the front.
If manual focus is the key, it is unlikely that an effect on autofocus would be much of an issue. |
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08/28/2005 01:30:59 PM · #8 |
Speaking of manuel focusing, I've been curious if anyone here has trouble when they go from AF to manuel.
I'm embarrassed to say that I stink at MF. Maybe 50% of my manuel focused pix come out blurred. Fortunately my Sigma 105mm macro does a good job on AF.
In general no matter what lens I try to manuel focus I have a hard time. Am I alone here? Wondering?
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08/28/2005 02:44:49 PM · #9 |
Originally posted by pawdrix:
Speaking of manuel focusing, I've been curious if anyone here has trouble when they go from AF to manuel.
I'm embarrassed to say that I stink at MF. Maybe 50% of my manuel focused pix come out blurred. Fortunately my Sigma 105mm macro does a good job on AF.
In general no matter what lens I try to manuel focus I have a hard time. Am I alone here? Wondering? |
Nope, you are definitely not alone. Manual focus is an art, and it takes a lot of practice to be really good at it. Try not concentrating on one specific area of the viewfinder, but letting your eye take in all of the image. Now focus back & forth, and you should see the plane of focus moving. That's really the way to manually focus, because you can place the subject where you want in relation to the plane of focus.
Th eviewfinders on cropped DSLRs are not as big, nor as bright as the viewfinders on full-frame DSLRs. The viewfnder screens are not optimized for MF either. This double-whammy makes it much more difficult to manually focus with these cams.
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08/28/2005 04:40:32 PM · #10 |
The viewfinder on the D70 is pretty small which I'm sure makes it harder. Glad I'm not alone.
Another reason to tip my hat to the oldtimers.
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08/28/2005 11:04:55 PM · #11 |
Larf. Pawdrix, if you are getting 50%, I'd say you were doing pretty well!
Manual focus is tough. You should try it with a tiny EVF! and arrow buttons! ACK!
I shot some pics at a snowboard/skateboard comp. recently. All manual focus. Hard as HELL! Took me 25 minutes before I got my first sharp pic. This was made worse because my camera gets even softer beyond f4. Trying to control where the focus was (preferably eyes or hand if he was facing away) was brutal. I got less than 1/6th good shots that day.
Playing with a shop D50 a couple of weeks ago was like paradise in comparison. Nonetheless, if you can get 50%, I tip my hat to YOU! |
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