Newsgroup: it.arti.fotografia.digitale
Titolo: Macro con Nex7 + Canon lens.

http://makrofokus.se/blogg/2015/9/24/nonac-40mm-f28.html
 
 
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https://www.flickr.com/photos/nicola_prisco/
 

 
http://makrofokus.se/blogg/2015/9/24/nonac-40mm-f28.html
 
 
Quasi micro, piu' che macro... :)
 
Lingua incomprensibile. Cosa fa esattamente quell'adattatore?
 
 
 
sandro

Lingua incomprensibile. Cosa fa esattamente quell'adattatore?
 
ha l'aria di essere un reverse ring con un ulteriore attacco per connettere 
i pin del corpo macchina con i pin dell'obbiettivo montato al contrario 
 

Nox ci ha detto :

Esatto.
 
-- 
https://www.flickr.com/photos/nicola_prisco/
 

sandro scriveva il 09/11/2015 :

Se guardi bene, all'inizio, in Inglese, dice che usando Google 
translater -> in Inglese,  si ottiene una versione chiaramente 
intellegibile.
Permette la comunicazione con l'obiettivo montato al contrario per 
usarlo in macro.
Tra l'altro chi ha scritto l'articolo è un maestro nella macro, tanto 
che le sue foto di insetti vengono utilizzate dall'Università di 
Stoccolma.
 
-- 
https://www.flickr.com/photos/nicola_prisco/
 

Ecco cosa mi ha generato Google translater.
"For this, I use only a step-up ring 37mm-52mm that fits into the 
adapter filter thread (37mm). Praise for Meike who had the presence of 
mind to provide the adapter with a filter thread, albeit in a slightly 
odd size. Thereafter, a 52-26 mm step down with duct tape. Finally, I 
fit even on pressing where a small blixdiffusor of a translucent 
detergent bottle, whose neck was perfectly suited for 26 mm hole.
 
There, time for assembly:
 
 
 
I chose to mount it on my Sony NEX-7 was now not simply for the 
pleasure to use additional adapter (Meta Bones EF-E). Main reason was 
that I was also looking for a light equipment for taking photographs at 
slightly higher magnifications.
 
 
 
In the image above, I have supplemented with an additional intermediate 
ring (Viltrox 38 mm) mounted between the camera body and the reversal 
adapter. And apparently are also flash on location. The flash is 
another Meike product, called MK-300. It is a small, handy device that 
is available on most systems and can be used in both TTL mode manually.
 
The green arrow marks show where the focus plane ends up with this set. 
At longer extract decreases the working distance and without any 
intermediate ring (Viltrox 38 mm) increases about 5 mm. The working 
distance remains so constant over different degrees of magnification, I 
perceive as an advantage. Partly because it makes it easier to find the 
right focus on pure "muscle memory". After a few hours with this 
equipment can be quickly rough focus without even looking in the 
viewfinder. This makes it quick and easy to find the subject and 
finfokusera viewfinder. That the working distance is so short, I see 
too often as an advantage. Mainly because it makes using hands fixate 
the subject in relation to the camera. But also because it facilitates 
a creative flash positioning (a slight backlit effect can be achieved 
by straightening the flash arm forward and tilt the flash to the 
camera).
 
A device such as this has been fixed magnification. That is, it 
requires the assembly / disassembly of the rings to change the 
magnification. There is obviously a limit, but maybe not quite so 
serious restriction as you might think. At least I do not experience it 
as so bad once I got used. If you want to be able to quickly control 
the magnification, one can use a solution for variable extract. There 
are, for example, between the rings with built-in focus shells. Meike 
has made such (see picture below), but unfortunately I got the 
impression that it was taken out of production because it is no longer 
offered for sale except in a few cases on eBay.
 
 
 
In the picture above shows an example of a slightly more flexible 
solution when it comes to magnification. Here Viltrox-between the ring 
replaced by an adjustable intermediate ring with built-in focus shell. 
To further increase the magnification, I have also inserted an 
extension between the lens filter and adapter. This extension consists 
of two Nikon K5 between the rings. These are really just empty metal 
cages with 52 mm thread at both ends. Because the cable provides 
communication information transmission in this part of the set plays 
virtually no role on this part consists of a toarulle, a bellows or 
anything that does not let in too much light. In practice threaded 
metal sleeves that K5-rings are practical because they are stable and 
light and lacks glossy / reflective surfaces on the inside.
 
And speaking of reflective surfaces: It can not be poänteras how 
important it is to counteract internal reflections when you experiment 
with different macro solutions! I am now very careful to cover all 
interior surfaces with black double-sided velvet material. It could 
simply be a millimeter wide strip of reflective surface between the 
lens and the camera sensor to an excellent result will turn into 
catastrophic!
 
Example images (with Canon 40 / 2.8 + Meike MK-C-UP)
 
Here you could certainly have thought at me to show examples of some 
different lenses in combination with this adapter. Perhaps with the 
complementary I on occasion. I chose to prioritize the Canon 40 / 2.8 
because it just felt like the perfect loophole for this purpose:
 
 
 
Small and light
Exceptional optics: very sharp, good color reproduction, fine 
oskärpeteckning
Cheap and well represented at Canon Photographers of tabs
Suitable focal length: not so long that it requires inconvenient way of 
extraction for high magnification and not so short that the 
magnification becomes excessive already on short extracts.
 
f / 11, 1/160, ISO100 | Fly belong probably Tachinidae (Parasitic Fly).
 
 
f / 9, 1/160, ISO100 | Bladstekellarv, Tenthredinidae
 
 
f / 9, 1/100, ISO200 | Krabbspindel, Xysticus sp.
 
 
f / 10, 1/125, ISO100 | Weevil, polydrusus cervinus
 
 
f / 14, 1/50, ISO100 | Lundblåoxe, Platycerus caraboides
 
 
f / 11, 1/80, ISO100 | Trädgårdsklokrypare Lamprochernes nodosus
 
 
f / 8, 1/30, ISO800 (cross polarization) | Ant (Lasius cf. niger) with 
aphids.
 
 
f / 9, 1/160, ISO100 | Large pine branch buck, pogonocherus 
fasciculatus
 
 
f / 10, 1/60, ISO100 | Rape butterfly, Pieris napi
 
 
f / 13, 1/50, ISO100 | Snap Fly, rhagio sp.
 
 
f / 9, 1/80, ISO100 | Rödmyra, Myrmica sp.
 
 
f / 9, 1/160, ISO100 | Rödmyrelarver Myrmica sp.
 
 
f / 11, 1/100, ISO200 | Average flat ram, Ostoma ferruginea
 
 
 
 
f / 11, 1/60, ISO200 | Galling from Eriophyes tiliae, gall mites on 
winding
 
 
f / 9, 1/60, ISO100 | Horn mites Oribatida, Damaeidae, Damaeus onustus?
 
 
f / 8, 1/100, ISO200 | Fourteen spotted ladybug, Propylea 
quatuodecimguttata
 
 
f / 10, 1/60, ISO200 | Hover fly (Syrphidae), probably Eristalis sp. 
(Slam Fly)
 
 
f / 10, 1/40, ISO200 | Red mulmblomfluga, Brachypalpoides lentus
 
 
f / 9, 1/60, ISO100 | Wing of the Green Hairstreak, callophrys Rubi
 
 
f / 9, 1/60, ISO100 | Green Hairstreak, callophrys Rubi
 
 
f / 9, 1/125, ISO100 | Weevil, Strophosoma melanogrammum
 
 
f / 10, 1/60, ISO200 | Ordinary sponge black ram, Bolitophagus 
reticulatus
 
 
f / 11, 1/50, ISO100 | Window spindle, amaurobius fenestralis
 
 
f / 9, 1/100, ISO200 | Rutklokrypare, Chernes cimicoides
 
 
f / 10, 1/60, ISO200 | SAW-FLY Tenthredinidae
 
 
f / 11, 1/100, ISO200 | Fungal Mosquito Larvae Mycetophilidae
 
 
f / 11, 1/100, ISO200 | Smalbi, Lasioglossum
 
 
f / 9, 1/160, ISO200 | Splendor beetle, Trachys Minuta
 
 
f / 13, 1/50, ISO100 | Hump ​​Dance Fly, Tachypeza nubila
 
 
f / 10, 1/125, ISO200 | Short Wing, Nudobius lentus
 
 
f / 11, 1/50, ISO100 | CATERPILLAR
 
 
f / 11, 1/60, ISO200 | Hornstrit, Centrotus cornutus
 
 
f / 9, 1/160, ISO100 | Rotfluga, Psila filament aria
 
 
f / 11, 1/160, ISO100 | Woodlouse, Oniscus sp.
 
 
f / 8, 1/125, ISO200 | Hårmygga (male), Bibio marci
 
 
f / 11, 1/160, ISO200 | Hårmygga (female), Bibio marci
 
 
f / 9, 1/60, ISO100 | SAW-FLY, Tenthredinidae
 
 
f / 11, 1/100, ISO200 | Flugbagge, Cantharis obscura
 
 
f / 8, 1/40, ISO400 (cross polarization) | CATERPILLAR
 
 
 
 
f / 10, 1/125, ISO200 | Antennmal Adelidae
 
 
f / 13, 1/160, ISO200 | Hover fly (Syrphidae), grass hoverfly 
(Melanostoma?)
 
 
f / 10, 1/160, ISO100 | Case beetle, cryptocephalus nitidulus
 
 
f / 10, 1/100, ISO200 | Leaf beetle, Plagiodera versicolora
 
The reason for the large amount of sample images is that I feel it is 
necessary to see many pictures of me to form an opinion on a solution's 
characteristics.
 
All the above photos are taken with backwards Canon 40 / 2.8 Sony NEX-7 
with diffused Meike MK-300 mounted on a friktionsarm. One could say 
that the light is "double diffused" because I both used a 
glasslådediffusor mounted on the flash and the small 
diskflaskediffusorn attached to the adapter (as illustrated above). All 
these photos are also single exposures taken in the field - ie, no 
stacking and no studio conditions. The magnification is in most cases 
between 2X and 4X, but many of the images are cropped so in practice 
recompose more diverse.
 
Here one can have different opinions but myself, I think it is 
completely unimportant whether the picture is taken at 2X and cut or if 
it is taken at 5X and not cropped - as long as the detail on the 
subject in the finished picture is the same. In practice, it is namely 
often so: If the depth is the same as the uncut picture almost always 
diffraction limited to the extent that the detail is still not better 
than in the cropped image taken at lower magnification. Besides that, 
there are more things to be said for the cropped image is better.
 
Evaluation
 
I perceive a solution to this very useful and able to deliver high 
quality results. The loss of flexibility (in magnification), win often 
in agility and ergonomics. The clear, bright viewfinder image in 
combination with a "moderately short" working distance makes it easy to 
find the subject and pinpoint focus with precision.
 
Spiral cable protrudes obliquely downward and can sometimes be 
disturbing. I thought most of it in the beginning so I guess I got used 
to it after a while. The position allows it to get take some beating in 
the box, but fortunately it appears to be of very good quality and I 
notice no visible wear.
 
The adapter does the job so smoothly that you soon forget that you are 
using a backwards solution and not a dedicated super macro lens.
 
The lens Canon 40 / 2.8 is of course largely to thank for this. It 
lives up to the expectations which were high after I used it diligently 
oriented correctly for normal photography. In terms of sharpness, color 
accuracy and absence of aberrations, I perceive that nonAC 40 / 2.8 is 
fully comparable with the Canon MP-E65, and there is no small amount!
 
The comparison with the MP-E65 is of course handy because it is this 
lens I otherwise tend to reach for when it comes to this type of 
photography. In the match wins the MP-E65 on utklassning crotch 
magnification flexibility - with a simple twist changes quickly from 1X 
to 5X, while nonAC 40 / 2.8 requires assembly / disassembly of 
intermediate rings. But one should also consider that they play in 
different weight classes literally - MP-E65 weighs nearly twice as much 
as nonAC including adapters and intermediate ring for shooting around 
2.5X.
 
A very nice feature of this lens is oskärpeteckningen. Partly it's 
because Canon 40 / 2.8 has seven rounded diaphragm blades which can be 
compared with the MP-E65 which has six straight sipes.
 
 
f / 8, 1/60, ISO100 | Vedsvampbagge Cis sp.
In the picture on the little tree mushroom driller (2 mm, Ciidae) 
crawling on the underside of the tree mushroom background consists 
almost entirely of the porförsedda fungus. This type of smooth 
patterned surfaces often creates uneasy blur. I think this nonAC 40 / 
2.8 meets the challenge with distinction! Had this picture rather taken 
with the Canon MP-E65, I am convinced that the background is perceived 
as clearly more "yxig" and distracting. After much experience in taking 
this kind of picture with MP-E65, so I reacted immediately when I saw 
the picture on the camera display how quiet background blur looked.
 
I have also done some experiments with this equipment, and handheld 
stacking. Vedflugan below are:
 
 
 
A stacked image aggregate of eight hand-held exposures. Each f / 9, 
1/160, ISO100 | Vedfluga, Xylophagidae
Finally, I could not help but to test what nonAC 40 / 2.8 could do in 
the studio. Below is a picture of a studiostackad Osmia rufa:
 
 
Studio image based on 121 exposures stacked in Zerene Stacker. Each of 
f / 4.5, 1.3S e, ISO100. Osmia rufa, Osmia bicornuate
 
I do not think it needs to be ashamed of himself here either, quite the 
opposite - the result looks very good. But the studio stacking all due 
respect - what makes a solution to this most interesting is still the 
way it manages handheld shooting moving subjects! It is under such 
circumstances can really benefit from the automatic down-mixing. In the 
studio conditions - or for that matter the tripod based field 
photography - it usually goes as well with a full-time manual solution.
 
This solution is available in the current situation only for Canon. Or 
Canon compatible system, I should of course say, given that Sony's 
cameras with E-mount is now fully compatible if you have an adapter. 
Meike was actually not the first of this type of adapter. Novoflex has 
long offered the corresponding reversal adapter, but the price of this 
(€ 300) has discouraged me from trying. The equivalent is not available 
for Nikon is probably attributable to Nikon still using mechanical 
Darkening (camera body aperture into the lens with a lever, rather than 
with electronics). This causes the corresponding adapter would be 
considerably more expensive to manufacture. Although the Pentax uses a 
mechanical aperture transmission in its K-mount lenses."
 
La traduzione, mi sembra eccellente, io ho fatto il mio a voi l'onere 
di associare il testo alle immagini.
 
-- 
https://www.flickr.com/photos/nicola_prisco/
 


Avrei giurato, che le immagini avessero una qualche radice 
scientifica... troppo "tecniche"... :)
 
Comunque, interessante, l'idea del giratore di ottiche con l'interfaccia.
 
 
 
sandro

 Comunque, interessante, l'idea del giratore di ottiche con l'interfaccia.
Infatti ed anche il prezzo. Mi farebbe piacere trovarlo per Nikon. Se 
andando da mio figlio, decido di spostarmi a Stoccolma glielo chiederò.
 
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https://www.flickr.com/photos/nicola_prisco/