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Chat => Photography => Topic started by: zpyder on August 30, 2010, 20:57:53 PM

Title: Macro lenses
Post by: zpyder on August 30, 2010, 20:57:53 PM
People have mentioned about wanting to get a macro lens, umming and arghing about it...but what are you looking at getting. It just dawned on me that my birthday is a little over a month away so I might as well give it a try with "Id like this macro lens for my birthday"

Obviously a £1k L lens is out of the question, but is there anything any good in the £200-300 range? Doesnt have to be new, but something that turns up fairly often on ebay at that sort of price so can be reliably acquired?
Title: Re:Macro lenses
Post by: Serious on August 30, 2010, 21:48:07 PM
Try Tamron 90mm macro.
Title: Re:Macro lenses
Post by: zpyder on August 30, 2010, 22:04:28 PM
Am I maybe asking too much, given that my 17-85mm minimum focus distance is only 60mm longer than that macro lens? It probably adds up I guess, but doesnt seem quite "as epic" as Id like.
Title: Re:Macro lenses
Post by: zpyder on August 31, 2010, 10:04:54 AM
Im thinking, is it worth maybe selling my Sigma 70-300mm DG lens and using that money along with the birthday towards a better telephoto lens that has IS, USM, and a closer focus distance? The sigma was alright as an entry level zoom, but its uber soft and slow to focus.
Title: Re:Macro lenses
Post by: Kunal on August 31, 2010, 10:14:29 AM
The original Canon EF 100mm f/2.8 Macro is excellent. Its pin sharp, has great bokeh and IQ. You should be able to pick it up in excellent 2nd hand condition for 350. I sold one recently for that much. New its a bout 400 ish I think.

Also does anyone even make a zoom macro lens which can do 1:1?



I only upgraded to the IS L one because I tend to hand hold.
Title: Re:Macro lenses
Post by: Mongoose on August 31, 2010, 11:21:16 AM
"macro" zooms are almost without exception pretty poor. They rarely go beyond about 1:3, (almost?) never to 1:1 and are without known exception worse quality than the cheapest macro prime.

Sigma and Tamron both make very nice ~100mm macro lenses ( Tamrons is a 90, Sigmas a 105). This focal length is generally the best for general macro. The Sigma 180mm Macro is widely very well regarded but also very expensive, the ~100s give very good performance, acceptable working distance for living beastys and dont cost the earth.

The other thing with the 100s is that they also make a very useful fast short telephoto prime for candid portraits. They are incredibly sharp, so cropping is limited only by the number of pixels on your sensor.

I use an old Manual focus Tamron 90mm SP, which serves me very well indeed and cost £50 with a matched teleconverter.
Title: Re:Macro lenses
Post by: zpyder on August 31, 2010, 11:29:50 AM
Something Ive always found confusing are the 1:1, 1:2 scales etc. Care to explain it in laymans terms?

I think the thing that confuses me is the fact the way I see it, nearly all lenses allow you to photo something and then print it out at a size larger than IRL. I mean, I could happily photograph a 50p coin at a range hat fills more than half the sensor area and then print it at A4 size, and thats without a lens that reports any kind of scale, when surely its like 10:1 or something silly?

The other question is, for the obscenely close macros, are extension tubes and the likes being used then?
Title: Re:Macro lenses
Post by: Mongoose on August 31, 2010, 12:41:06 PM
the ratio notation refers to the size of the image on the sensor.

An image taken at 1:1 is the same size on the sensor as it is in real life. The size of the print or the image on screen doesnt enter into it.

I think some manufacturors have occasionally made really specialised lenses which focused to 2:1 natively, but generally if youre going beyond 1:1 then youre going to need extension tubes, teleconverters, stacked reversed lenses or some combination of all three. A 50mm prime mounted backwards on the front of a macro lens works rather well if you want to get REALLY close.

this for example

(http://img.photobucket.com/albums/v68/thatguypinchedmyname/IMGP1630.jpg)

If I recall correctly was a 35mm prime reversed on the front of an 80-200 zoom at 200 with two 2x converters.

Its the lettering underneath the queens head on a penny.

Edit: anyone asking "why the hell did he take that rather crappy photo?" yes, it is rather crappy, it was a challenge on another forum to see who could get closest to the aforementioned lettering. I didnt win.
Title: Re:Macro lenses
Post by: zpyder on August 31, 2010, 12:47:26 PM
I wonder if I could get closer with the microscope setup :D

EDIT:
Possibly...just looking through the eyepiece shows that your image is zoomed in a bit more, but if I used a lens on the camera rather than mounting it directly to the microscope I think I could zoom in closer...

Ive tried the 50mm reversed option, but not really played around with it too much. Looking into things the 100mm usm is likely a good bet.
Title: Re:Macro lenses
Post by: Kunal on August 31, 2010, 13:55:17 PM
If you want to get really close you can also check out the Canon MP-E 65mm f/2.8

5:1 !
Title: Re:Macro lenses
Post by: Mongoose on August 31, 2010, 13:57:51 PM
I dont know of any true macro primes which are considered to be "bad", one or two stand out as even better than usual (The Kiron 105, original Vivtar Series 1 100, Pentax 200 macro, if Canon make an L series macro its probably stunning, etc) but even the Cosina 100mm f/3.5 is supposedly very good optically, just a bit plastic in terms of build quality.

Macros are never afflicted with "kit lens" syndrome, so anything with a well known lens makers badge on it is likely to be very good indeed.
Title: Re:Macro lenses
Post by: zpyder on September 02, 2010, 21:51:59 PM
This is what I get through the scope set up.
(http://farm5.static.flickr.com/4152/4951816187_59760baaef.jpg) (http://www.flickr.com/photos/zpyder/4951816187/)
Coin (http://www.flickr.com/photos/zpyder/4951816187/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr


I tried it with the 10x eyepiece in place, and could get a very bad picture of just the B (I think its the B) zoomed in.
Title: Re:Macro lenses
Post by: Serious on September 03, 2010, 03:58:00 AM
Quote from: zpyderSomething Ive always found confusing are the 1:1, 1:2 scales etc. Care to explain it in laymans terms?

1:2 or 1:1 scaling as has been said is the comparative size of the subject to its image on the sensor but this is for a 35mm sized sensor. A small sensor 1:2 will produce an image nearer 1:1 on small sensor cameras.

This says nothing about the output scale. You could take a picture of an insect at 1:1 and print it on an A6 page, or you could blow it up and stick it on a billboard. The original photograph scale is still 1:1

QuoteThe other question is, for the obscenely close macros, are extension tubes and the likes being used then?

Yes, Ive got a +4 lens but am considering some extension tubes or bellows.
Title: Re:Macro lenses
Post by: Mongoose on September 03, 2010, 11:33:13 AM
Quote from: Seriousbut this is for a 35mm sized sensor. A small sensor 1:2 will produce an image nearer 1:1 on small sensor cameras.

no, 1:1 is always 1:1 whether its 35mm film, APS-C digital, or large format sheet film for that matter. Macro ratios only refer to the size of the image on the capture device (film or sensor).


How high a ratio you can go to before your image is larger than your frame is another matter entirely, but a 25mm subject remains 25mm across whatever camera you point at it, so a 1:1 image of said subject is also always 25mm across at the sensor plane.


Sorry to sound nit picky, but I feel its important to get things like this exactly right from the start to avoid confusion later and Zpyder is obviously just trying to get what can be a pretty wierd set of conventions straight in his head.
Title: Re:Macro lenses
Post by: zpyder on September 03, 2010, 16:15:10 PM
I actually got the idea once it was explained pretty quickly. Im almost tempted to go the whole hog and get the L with IS, but ultimately I think that extra money is wasted on the grounds of the chances of ever selling a photo etc being < 0.1%
Title: Re:Macro lenses
Post by: Serious on September 06, 2010, 03:21:58 AM
Quote from: Mongoose
Quote from: Seriousbut this is for a 35mm sized sensor. A small sensor 1:2 will produce an image nearer 1:1 on small sensor cameras.

no, 1:1 is always 1:1 whether its 35mm film, APS-C digital, or large format sheet film for that matter. Macro ratios only refer to the size of the image on the capture device (film or sensor).


How high a ratio you can go to before your image is larger than your frame is another matter entirely, but a 25mm subject remains 25mm across whatever camera you point at it, so a 1:1 image of said subject is also always 25mm across at the sensor plane.


Sorry to sound nit picky, but I feel its important to get things like this exactly right from the start to avoid confusion later and Zpyder is obviously just trying to get what can be a pretty wierd set of conventions straight in his head.

Yep but try blowing up an image produced using a 1:1 lens on a full frame, 35mm sensor, camera and one using the same lens on a small sensor to the same percentage and the small will produce a bigger magnification all other things being equal. Lenses are based on 35mm frame size, not the smaller ones.

I know its meant to work the way you describe but varying factors change that when you go digital. A 1.5 million pixel sensor will not produce the same image as a 15 million pixel sensor, nor will a full frame 15 million pixel sensor produce the same as a 15 million pixel reduced size one.
Title: Macro lenses
Post by: Binary Shadow on September 06, 2010, 11:56:49 AM
the image is 1:1 on the sensor but the size of the sensor crops it, so its still 1:1 but your only capturing a section from the center surely thats how it works
Title: Macro lenses
Post by: Mongoose on September 06, 2010, 14:34:46 PM
Quote from: Binary Shadowthe image is 1:1 on the sensor but the size of the sensor crops it, so its still 1:1 but your only capturing a section from the center surely thats how it works

got it in one :)  :cheers:
Title: Re:Macro lenses
Post by: zpyder on September 06, 2010, 18:11:50 PM
And to confuse matters more, in this case would that mean compared to a full frame sensor of the same mp value, the 1.6 image, though cropped down, will be higher res?
Title: Re:Macro lenses
Post by: zpyder on September 07, 2010, 20:06:55 PM
New toy arrived this morning, only had a chance for a little bit of a play. I think this lens is going to take a bit of getting used to. That and Im going to need some better lighting, dont think the 40D flash quite cuts it!


(http://farm5.static.flickr.com/4149/4968076557_07012efe82.jpg) (http://www.flickr.com/photos/zpyder/4968076557/)
Jay feather (http://www.flickr.com/photos/zpyder/4968076557/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr

(http://farm5.static.flickr.com/4113/4968077379_06c04c873e.jpg) (http://www.flickr.com/photos/zpyder/4968077379/)
Budwing Mantis (http://www.flickr.com/photos/zpyder/4968077379/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr

Bit hazy as its through the grotty tank glass...
(http://farm5.static.flickr.com/4083/4968686476_1151c552c5.jpg) (http://www.flickr.com/photos/zpyder/4968686476/)
Gordon the crab (http://www.flickr.com/photos/zpyder/4968686476/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr
Title: Macro lenses
Post by: Binary Shadow on September 07, 2010, 20:32:11 PM
ideally you want a macro ring flash for it
Title: Re:Macro lenses
Post by: zpyder on September 07, 2010, 21:07:03 PM
Yeah, sod that...for now. Ill be using it outdoors mostly so I doubt itll be too much of an issue. I know the photos above are a bit pants but Im impressed with them, on the grounds of the first 2 being quite a bit smaller than they look in those photos. The Both the feather and the mantis are only an inch long or so. Im also quite pleased how the lens does with things further away. If I head out this weekend I think Ill leave the 17-85mm at home and just take the 50mm and 100mm.
Title: Re:Macro lenses
Post by: Mongoose on September 08, 2010, 09:11:03 AM
Quote from: zpyderAnd to confuse matters more, in this case would that mean compared to a full frame sensor of the same mp value, the 1.6 image, though cropped down, will be higher res?

yes, the crop sensor with the same total MP count has smaller pixels so higher spatial resolution.
Title: Re:Macro lenses
Post by: zpyder on September 11, 2010, 18:37:20 PM
So, didnt get to go out today as I stubbornly refused to believe that the weather would get better during the day, after spending the whole week being told today would have heavy rain.

But as the sun came out a few hours ago I ventured into the garden and took a few more shots when it was fairly sunny. Still learning, its weird having a prime, and the way the focus ring works, when you focus it down to its max it doesnt lock out but the ring keeps turning, which gets a bit confusing. Next time I think Ill use AV mode to try and increase the DOF a bit.


Wasp on a bug hotel I made a few months ago, pretty chuffed, both with the lens and the fact the bug hotel is working as intended.
(http://farm5.static.flickr.com/4083/4980100744_fb3e075546.jpg) (http://www.flickr.com/photos/zpyder/4980100744/)
Wasp on bug hotel (http://www.flickr.com/photos/zpyder/4980100744/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr

Flesh fly (I think) on the wooden fence at the back of the garden.
(http://farm5.static.flickr.com/4149/4980102316_af933c528e.jpg) (http://www.flickr.com/photos/zpyder/4980102316/)
Fly (http://www.flickr.com/photos/zpyder/4980102316/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr


(http://farm5.static.flickr.com/4086/4979495609_70f6d8eb2a.jpg) (http://www.flickr.com/photos/zpyder/4979495609/)
Rhododendron leafhopper (http://www.flickr.com/photos/zpyder/4979495609/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr
Title: Re:Macro lenses
Post by: zpyder on September 19, 2010, 11:07:44 AM
Some shots from yesterdays attempts:


(http://farm5.static.flickr.com/4110/5004007634_c4d7e5ee83.jpg) (http://www.flickr.com/photos/zpyder/5004007634/)
Greenbottle (Lucilia caesar) (http://www.flickr.com/photos/zpyder/5004007634/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr



(http://farm5.static.flickr.com/4132/5004004434_1584c8035f.jpg) (http://www.flickr.com/photos/zpyder/5004004434/)
Spider (http://www.flickr.com/photos/zpyder/5004004434/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr


I know this one sucks, I used the built in flash as it was on the inside of the composter, but I just think the iridescence is pretty cool.
(http://farm5.static.flickr.com/4089/5004001076_0a88b3ec1a.jpg) (http://www.flickr.com/photos/zpyder/5004001076/)
Iridescent spider (http://www.flickr.com/photos/zpyder/5004001076/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr

(http://farm5.static.flickr.com/4154/5004017430_61f589d6a9.jpg) (http://www.flickr.com/photos/zpyder/5004017430/)
Woodlouse (Porcellio scaber) (http://www.flickr.com/photos/zpyder/5004017430/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr

One of the pinned beetle larvae I was photographing under the microscope, figured Id see how the lens faired just as is. Im guessing if I used a diffuser and an offset flash gun the shadows would have been much less harsh
(http://farm5.static.flickr.com/4086/5003962302_c072145508.jpg) (http://www.flickr.com/photos/zpyder/5003962302/)
Dytiscus circumcinctus larva (http://www.flickr.com/photos/zpyder/5003962302/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr

Lens does well as non-macro stuff too, a blue tit flew past and landed in a nearby hedge and watched me:
(http://farm5.static.flickr.com/4130/5003402089_bd3eea4cfb.jpg) (http://www.flickr.com/photos/zpyder/5003402089/)
Blue Tit watching from a bush (http://www.flickr.com/photos/zpyder/5003402089/) by Chris_Moody (http://www.flickr.com/people/zpyder/), on Flickr

Can deffo see the use for IS. I tried using my tripod a few times but because of the legs, it was pretty restrictive and every time I tried to position the set-up, the subject scarpered. Hopefully a new manfrotto in a few weeks will help.