Jump to content
Scubysnaps

Sony NEX-6 Samyang 8mm vs Nikon D90 Tokina 10(-17)mm

Recommended Posts

ok will do so when I have access to more daylight outside of work.....Friday, but will also try and look thru what I have already taken in the evening

Share this post


Link to post
Share on other sites

ok, managed to pop out for lunch and get some more fairly colourful 8mm sunny iso100 shots at infinity focus and f22, sadly no D90 with me (too big ;) ), but hopefully they show sharpness throughout, will dodge some shadows too, see how they come out

Edited by Scubysnaps

Share this post


Link to post
Share on other sites

Thanks for the comparison, but remember no good deed goes unpunished, lol. I think many "were" excited about the Sony line but the lens issues have tempered that excitement. The OMD has caught on because it is a good camera and with it's line-up of lenses everyone can go out TODAY. Sold my D7000 gear, taking the Sony RX100 on the net trip and still on the fence with OMD vs. Sony Nex vs. Fuji. Question is can people (me) wait till spring for the new Zeiss lenses??? Will there be a new version of the Nex7 between now and then??? Interested to see more on the Nex6.

  • Like 1

Share this post


Link to post
Share on other sites

i hope to use a diopter or 2 with the kit lens for macro until thats out, remember if you buy MFT you cant use your DX lenses on it, there's an electronical adapter hopefully out in Spring, so you wont have to fork out for another expensive lens collection. A mirrorless EVF will never beat a dSLR viewfinder, and that feel, just handy for the odd land shoot

Share this post


Link to post
Share on other sites

WOW!

 

Quality reduced to 57% file size about 500k from a fine jpeg image

1/60sec iso100 focus infinity f22...this is magic! 1st shot of 3

post-16933-0-97860500-1351626765_thumb.jpg

Share this post


Link to post
Share on other sites

above image is a crop of this one, reduced to 50% quality and 640x640px to fit it under a meg

post-16933-0-74461700-1351627378_thumb.jpg

Share this post


Link to post
Share on other sites

Thanks for the comparison, but remember no good deed goes unpunished, lol. I think many "were" excited about the Sony line but the lens issues have tempered that excitement. The OMD has caught on because it is a good camera and with it's line-up of lenses everyone can go out TODAY. Sold my D7000 gear, taking the Sony RX100 on the net trip and still on the fence with OMD vs. Sony Nex vs. Fuji. Question is can people (me) wait till spring for the new Zeiss lenses??? Will there be a new version of the Nex7 between now and then??? Interested to see more on the Nex6.

Spring?, I can only hope but Zeiss said spring/summer so I am planning on seeing them sometime in early September. I hope you are right, but everything for the NEX seems to take a lot longer to get out.

Bill

Share this post


Link to post
Share on other sites

original that I had dodged for the above image in LR, no other work done at all apart from compression to get it on here

post-16933-0-90345600-1351627553_thumb.jpg

Edited by Scubysnaps

Share this post


Link to post
Share on other sites

quality upped a bit to just under a meg 80% qual at 950pix

 

more, same settings, untouched

post-16933-0-49747400-1351627934_thumb.jpg

post-16933-0-49228200-1351628048_thumb.jpg

Share this post


Link to post
Share on other sites

maybe too much quick dodging here

 

untouched.

 

crop

post-16933-0-28715400-1351628347_thumb.jpg

post-16933-0-85356200-1351628428_thumb.jpg

post-16933-0-62152400-1351628536_thumb.jpg

Share this post


Link to post
Share on other sites

moving car, ok sorry i did it at 1/400, should have done it at 1/200 max

 

2:1 crop

post-16933-0-64220800-1351628739_thumb.jpg

post-16933-0-73510100-1351628854_thumb.jpg

Share this post


Link to post
Share on other sites

a bit heavy and messy on the dodging again, but I'm noit here to try and win awards or something!

post-16933-0-43764200-1351629457_thumb.jpg

Share this post


Link to post
Share on other sites

2:1 crop of tower block at beginning...ok can I stop now!?

post-16933-0-12574600-1351629580_thumb.jpg

Share this post


Link to post
Share on other sites

ok, onw more 2:! crop from the same image, with the exposure dropped 1.3 stops

post-16933-0-95835700-1351629831_thumb.jpg

Share this post


Link to post
Share on other sites

oops forgot one, lots of masked clarity etc gone on here 1/1000 at iso 100

 

who needs a big d800!

post-16933-0-34124700-1351630539_thumb.jpg

post-16933-0-70800000-1351630599_thumb.jpg

Share this post


Link to post
Share on other sites

In a previous post I have a few images taken with my 400d using both Samyung and the Tokina with a 1.5 Teleconverter in similar conditions behind a 6" Dome.

Share this post


Link to post
Share on other sites

You are doing a great job at showing the Sony is a good camera...I wish there were some D90 shots!

Share this post


Link to post
Share on other sites

How can I say it..just a bit disheartened I'm not hearing from guys who I learnt from 3 years ago on here, guys with more posts than me say? Come on chaps

Share this post


Link to post
Share on other sites

Hi Paul,

 

Interesting lens this Samyang.

 

I have read that the lens is fully manual. Then, when you use it UW, which focus distance and F establish?

Share this post


Link to post
Share on other sites

Thanks Yako. I've given plenty of examples above at different apertures and focus lengths. All of them work fine. It's just a case of trial and error. You choose your lens before you dive depending on what you plan to shoot, why not your focus and aperture? You can still adjust your shutter speed and further adjust your exposure by ISO, and focus is guided by the peaking. I'm sure the name Tokina got laughed out of the water at some point in the past?

Share this post


Link to post
Share on other sites

Unfortunately your evaluation doesn't give any idea of this lens' underwater performance.

 

When underwater focus for objects at any distance will be between about 0.11m and 0.21m behind the Nauticam 4.33" dome port. Lenses behave differently when focusing very close. It makes sense only to evaluate the lens when shooting objects at this distance (or at distances for the virtual image for other housings / dome ports).

 

The fact that the lens sits too far back in the Nauticam 4.33" dome (and thus vignettes), may also lead to less desirable optics underwater (increased corner softness, for example, although the vignetting may or may not make that a non-issue.)

 

The image will soften significantly at small apertures (i.e. > f/11). This may not be visible in web-sized images, but it will be visible in full size images (unless the lens is so soft in general it's not visible), and very noticeable at f/22. So while depth of field increases with apertures >f/11 (making it easier to use fixed focus) overall sharpness decreases.

 

I do think you'll be able to set the focus at about 0.16m (if you're lucky 0.14m) and f/11 and get almost everything in reasonable focus underwater; whether this is as good for large prints as an auto-focus lens remains to be seen...

Edited by coroander

Share this post


Link to post
Share on other sites

Thanks for the input, jmauricio's pool examples seemed ok to me, for what it is I also plan to file the dome shade down to eliminate any vignette if i het the nauticam dome port if it hasnt changed, I have just done examples as requested at various settings, all ofr which beat the tokina in many ways

Share this post


Link to post
Share on other sites

But for underwater use all that matters is close focus performance on a curved field. The Samyang may be better for land use, but its close focus performance or curved field performance may not exceed that of the Tokina because lenses' performance can change massively at close focus. The lenses use very different designs and may respond significantly differently when challenged on close focus, curved field targets.

 

A better test would be to place objects in two concentric semi-circles of 33cm and 11cm diameter (16.5cm, 5.5cm radius) on a table, then place the front of the lens at the centre of the circle that would be formed by these semicircles and take photos. That'll give you a curved field, close focus target. And it will give you an indication of their performance underwater inside their respective Nauticam 4.33" dome ports. You'll also be able to test depth of field with your 8mm lens (try focus at 0.15m and f/11 and see if objects in both circles are sharp).

Edited by coroander

Share this post


Link to post
Share on other sites

Sponsors

Advertisements



×
×
  • Create New...