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Mark Twain

Member Since 06 Dec 2013
Offline Last Active Today, 04:55 AM
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Posts I've Made

In Topic: Sony a65 Mod with Sigma 10-20mm f/3.5 EX DC HSM LENS

25 December 2015 - 10:57 AM

Thank you for the image and description. I think this is a good solution. If you still want to use a shade for topside shots you can as well use some generic screw-in shade.

 

Update: ikelite started making an extension that is likely the perfect distance (between the best two above) so it shouldn't show the port at 10min. Going to check it out this weekend or next.

 

Having the ability to zoom from 11(/10)-20mm would be great for fish portraits. Have you already made the test with the new extension?

 

Happy holidays!


In Topic: Macro with the A7R II & Sony FE 90mm macro

28 November 2015 - 06:21 AM

Hi Mark, Regarding A fisheye lens for the Sony E mount A7 series what I said is that a fisheye would be a welcome addition not that one exists. 

 

Regarding the A7R II with the Sony FE 28mm F/2 lens, Nauticam has now released the WWL-1 conversion lens which makes the 28mm a 130 degree AOV lens without the barrel distortion of a fisheye lens, see this thread for more information, http://wetpixel.com/...866#entry367586

 

I would not recommend the Sony fisheye converter for the 28mm F/2 over the WWL-1 or at all for that mater on a high MP camera like A7R II. 

 

Hi,

 

sorry that was a misinterpretation for my part. The WWL-1 seems to be significantly cheaper than the 16-35 with a suitable Dome (but at the cost of less versatility). A 180° fisheye would be great nevertheless - just as you said ;-)


In Topic: Macro with the A7R II & Sony FE 90mm macro

26 November 2015 - 11:53 AM

Hi phil,

 

could you provide more information about how you took the pictures? Aperture and method of focusing (af/mf and continuous af or single shot?)? The lens seems to be tack sharp, although in some pictures focus seems a bit misplaced to me (fore example in the first picture the focus is slightly before the eye).

 

You mentioned the availability of a fisheye lens. As there is already the SEL057FEC which converts the FE 28/2 into a fisheye lens, have you ever considered using this combination (assuming that a port is available)? I highly doubt that there will be a native (in the sense that it is not an adpater solution) any time soon as the SEL057FEC is available.

 

Regards!


In Topic: Sony a65 Mod with Sigma 10-20mm f/3.5 EX DC HSM LENS

27 October 2015 - 04:17 AM

Could you please post a picture of how you modified the lens?

 

Interesting work, I considered buying a rectilinear ultra-wideangle lens once but ended up buying the Sigma 10/2.8 diagonal fisheye.


In Topic: Diving in Croatia

27 September 2015 - 02:22 AM

Thank you!

 

Unfortunately the max sync speed of the A65 is 1/160 - a pure software limitation, as its big brother (the A77) which has the same sensor and processor is capable of doing 1/250. I think the key to better sharpness is more stability.

 

As you said it is nowhere near the Caribbean or Red Sea or many other spots, but when you live in Central Europe it is easy to get there by car for three or four days and gives you some nice diving. I've been at Trogir Diving Center and most diving spots are whin this region.