Macros from June 2019

pake

Mu-43 Hall of Famer
Joined
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Teemu
All shot with an E-M5 and Oly 60mm with one or two Raynox DCRs attached (150+250).

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EM5B4036 (2019/06) by Teemu Paukamainen, on Flickr

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EM5B4458 (2019/06) by Teemu Paukamainen, on Flickr

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EM5B4672 (2019/06) by Teemu Paukamainen, on Flickr

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EM5B4803 (2019/06) by Teemu Paukamainen, on Flickr
F/18. Should be garbage because of the diffraction, eh? Well, I'd say it's still usable (especially if you look at the picture in 1:1 mode on Flickr). ;)

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EM5B4806 (2019/06) by Teemu Paukamainen, on Flickr


More macros can be found here: https://www.teemup.net/photographs/macro
 

archaeopteryx

Gambian sidling bush
Joined
Feb 25, 2017
Messages
1,275
F/18. Should be garbage because of the diffraction, eh?
It'd be best to measure the effective aperture directly but, from the 74 cm focus distance of the lens, magnification should be around 0.9x or less. That means the front lens aperture of the coupled lens pair formed by the Raynox(es) uesd and 60 mm will be much wider than the f/18 of the 60. The 60 therefore stops the Raynox(es) down from behind by 3-5 stops which means the effective aperture of the pair is probably close to f/18 and that aberrations of the Raynox(es) are well suppressed. On its own, the 60 would give something in the f/18-34 range depending on magnification, presumably towards the smaller side.

There are various ways of estimating the effective number of megapixels around f/18 due to diffraction blur. They're all going to come up with somewhat different numbers but a 16 MP sensor m43 provides in the vicinity of 3.5 MP at f/18. The largest size Flickr offers me is 1.6 MP so, even if some cropping was done, it's probably not like the image is being especially pushed. It's obviously chunky at the pixel level and I think that shows a little at forum size, though web browsers aren't known for quality rescaling. I don't see it as a limiting factor as I notice the cut off tarsa more. I did post a 100% crop at an effective aperture of f/13 a few hours ago if you're interested to compare, though. (It's from 4k frames and focus stacked twice, so make some allowance.)
 

pake

Mu-43 Hall of Famer
Joined
Oct 14, 2010
Messages
2,023
Location
Finland
Real Name
Teemu
Ah crap. Now u're gonna make me have to buy a 150 as well. :p

These are great. Has your lighting setup changed? Were these stacked?
Thanks!! Lighting setup hasn't changed: Godox TT685o + the inflatable diffuser (but turned to portrait mode instead of the old landscape mode).

2 Raynoxes or one? Hard to say since I have 'em both on the lens but if the subject is too big or I can't get close enough I might need to take the outer one off (or sometimes both) and the Raynox info doesn't get recordered to the file exif (and it's been months since I took the photos). :D

EDIT: Just realized you probably meant if the photos were stacked and not the Raynoxes. Nope, none of them are stacked - just one image shots all.
 
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