In macro, AF is useless, and in most cases, built in MF is even useless. You focus by rocking your body back and forth (handheld) or adjusting the position of the whole camera with dials and rails (if tripod mounted).
The 18-55 Canon kit lens is actually able to do fairly decent macro straight up, without any extension, loss of aperture control, speed, or focusing light (tubes make it darker), extra expense of tubes that preserve those features, etc. etc.
Just attached normally, it has a surprisingly close focus ability and can achieve 0.35 magnification (you can fill the frame with an object 3x as large as the sensor). For example, a monarch butterfly with wings folded would come awfully close to filling the entire frame at the limit of your close focusing range.
So you could actually just use the kit lens alone for awhile, and then upgrade to extension tubes (with electronic connection preserved, but expensive, though not as much as a macro lens) or a simple bellows or similar (cheap as dirt, but less convenient) a little later to achieve up to and beyond 1.0 magnification.
Considering that Macro is generally defined as 1to1 ie. 1:1 capture, the 18-55 3.5-5.6 only does closeup not macro photography.
Not only does Canon's most expensive macro lens not have AF, it doesn't even have a manual focusing ring at all.
Funny, this is Canon's most expensive Macro Lens and it has a focus ring as well as AF. Canon EF 180mm f/3.5L Macro USM | Canon Online Store
If you are talking about the MP-E 65, mine has a focusing ring that sets magnification and focus. (Page 5 of the user manual.) It just happens to be manual only focus.
Thank you for your nitpicky contributions that do nothing to usefully aid the OP.
1) 1:1 is neither a universal definition by any means of "macro," nor would it really matter if it were, since one's enjoyment of photographing small things does not magically begin at 1:1, and I was very clear and accurate (and actually attempting to be helpful...) in what I meant to say, even going so far as to include an example.
2) I was referring to the MP-E 65mm f/2.8 1-5x, which I suppose is their 2nd most expensive macro lens. I'm sure you knew this full well, and the point still stands that many people will focus entirely by rocking back and forth/using rails, not by using a focus ring or AF or even MF. Especially if using focus stacking, which is virtually impossible with AF.
It's certainly a valid way, but not a necessary way, and is more or less entirely redundant with physically moving back and forth.Really? I guess I have been doing it wrong then. Can you teach me the right way?
The main reason that the lenses like the 180mm and 100mm etc. likely have focusing rings in the first place, is because you can shoot non macro photography with them, subjects at 15 meters or whatever. Otherwise the lenses could be, and in at least one case (when the long distance focusing was unneeded) were, made more cheaply without them, with no real loss in functionality. Canon apparently agreed with my reasoning.
In macro, AF is useless, and in most cases, built in MF is even useless. You focus by rocking your body back and forth (handheld) or adjusting the position of the whole camera with dials and rails (if tripod mounted).
Really? I guess I have been doing it wrong then. Can you teach me the right way?
1) 1:1 is neither a universal definition by any means of "macro," nor would it really matter if it were, since one's enjoyment of photographing small things does not magically begin at 1:1, and I was very clear and accurate (and actually attempting to be helpful...) in what I meant to say, even going so far as to include an example.
2) I was referring to the MP-E 65mm f/2.8 1-5x, which I suppose is their 2nd most expensive macro lens. I'm sure you knew this full well, and the point still stands that many people will focus entirely by rocking back and forth/using rails, not by using a focus ring or AF or even MF. Especially if using focus stacking, which is virtually impossible with AF.
I know a lot of GOOD macro photographers that focus with MF.. and only use the rocking when at FULL magnification where MF is no longer possible. I don't believe I have seen any of your macro work???
I've shot a Canon 35mm for years. I want to upgrade to digital. My problem is a $500 budget. I shoot mostly macro of plants and occasionally need zoom for distant tree subjects. I've looked at the Canon SX50, but can get a factory refurbished Nikon 3100 for about the same money.
I'm concerned about the Canon image quality with that small sensor. I would also like RAW. The Canon SX40 has a hack that will enable RAW, but don't know if I'm computer savvy enough to get it to work. The Nikon comes with the usual 18-55 lens, but don't know how that would do on macro.
ANY opinions would be appreciated as I'm about to go nuts muddling through the technical jargon.
Will the small sensor in the SX50 and 40 yield "snapshot" images? The zoom on the SX50 is a moot issue to me, what normal amateur can hold that 50x lens steady?
Please give me some feedback/opinions. And yes I realize my budget is a factor....but it is what it is.
Thanks in advance for your time and expertise.
Just F.Y.I., so does Canon, and since he appears to be sticking with Canon gear...Plantman; if you have the budget for it, Nikon makes a neat flash for macro that uses two flash heads, one on either side of the lens for macro flash.
I don't do a ton of macro, but it's not because of a lack of ability to get clean focus. I can and have gotten clean focus just fine from rocking back and forth, even at significantly sub-1:1 distances. For example these were both focused entirely by rocking, despite being maybe 0.15-0.2 (?) reproduction ratio, tops:
View attachment 48821View attachment 48822
In fact, I often rock back and forth to refocus subjects at 3-20 feet away! Especially when composing subjects off center, and doing a "center and recompose" strategy. Since turning the camera tilts the focus plane, I often lean back by an estimated correct amount right after pivoting, to compensate and bring the subject back into focus without having to fiddle with anything, even with AF on. Example of a portrait that I did final focusing on by calculated leaning away only, from 10 feet or so, at a reproduction ratio of about, i dunno, 0.03??
View attachment 48823
And rocking only becomes more and more practical at higher ratios than these.
First let me thank all of you for your advice......I can tell you didn't come by your expertise by just shooting snaps with pin hole cameras. The Canons I used, both use lenses with FD. I thought I was screwed until you guys mentioned the possibility of an adapter.
I did consider the Canon G15, but put it on the back burner because of adaptability. The Canon SX50 reviews and ads are seductive, but I know the sensor size won't give me the quality that I want.
Based on my research and your kind feedback....I'm inclined to go with the factory refurb with kit lens. One further question, since your guys know what you're about......in digital....could you add a 1.5 or 2x to boost the "tight" magnification? As you know, getting in too close, you run into MAJOR shadow problems. BTW, I'm a Horticulturist and if it's green or blooms, I wanna shoot it. You guys have given me more bankable info that a month of fiendish searching/research on the net. In closing, I appreciate all your opinions, and consider each one.
Plantman; if you have the budget for it, Nikon makes a neat flash for macro that uses two flash heads, one on either side of the lens for macro flash.