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Aussiebyron

Member Since 04 Jan 2009
Offline Last Active Yesterday, 11:58 PM
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Posts I've Made

In Topic: What wideangle to choose for canon 7dmii

06 June 2018 - 07:00 PM

I found the Sigma 17-70mm a bit useless underwater as its not wide enough for me for wide angle and its not that good for macro on the other end as you have to use it with a big dome.  I think there are few others are like me who bought the lens as it was discribed as a great general purpose lens and ended up using it for a few times before retiring it to the collection of dust gathers.

 

Regards Mark


In Topic: What wideangle to choose for canon 7dmii

04 June 2018 - 04:14 PM

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Heres a few images of Manta's up close with a fisheye

 

Regards Mark


In Topic: What wideangle to choose for canon 7dmii

04 June 2018 - 05:53 AM

Many of the pics will hopefully be mantas and also sunfis to clarify that if it makes it different

 

As Tim stated, the Fisheye lens like the Tokina 10-17mm on Dx camera underwater is a different animal than compared on land.  The benefit of such a wide angle of the Tokina 10-17mm especially as 10mm is that you can fit a whole large animal like a Manta in the frame as well as being nice and close to get good coverage from your strobes to light the subject.  Get close and have the strobes positioned well is the secret.


In Topic: Nikon 8-15mm in the house!

27 May 2018 - 06:02 AM

Hi Mark. Optically, the greatest difference is substantially less chromatic aberration with the 8-15. Subjectively, the lens is also significantly sharper. As expected, these differences are more pronounced towards the edges of the image.
A downside is the reduced useful zoom range on DX meaning less reach. If youre not careful It is also easy to waste a few pixels by zooming out too far and cutting off the corners. These issues can be avoided by using a Kenko 1.4x teleconverter although this does sacrifice a few degrees of coverage at the wide end. Optically this combination works well behind a dome. When I last looked, no manufacturer offered a zoom gear for the combination so I use the standard Nauticam gear and a removable collar that provides the necessary extension.
For me the image quality improvements far outweigh the minor downsides and I have retired my Tokina.
Regards, Mark

 

Mark, appreicate your reply.

On the wider scale of things have you compared the Nikon 8-15mm against the Nikon 10.5mm Fisheye on the D500?

 

Regards Mark


In Topic: Nikon 8-15mm in the house!

26 May 2018 - 08:15 PM

Alex. I have recently taken about 560 images underwater with the Nikkor 8-15 fisheye on the DX format D500, around 230 of which contained partial or full sunbursts or dappled light. Most were taken with a 210mm Nauticam acrylic dome but a few were with a Zen DP100 dome and a few again were taken in conjunction with a Kenko 1.4x TC. Focal lengths varied through the DX applicable zoom range and there are a mixture of horizontal and vertical format shots. None of the images show any hint of the flare seen in your and Adam’s shots. Many of the sunburst shots were taken fairly shallow – a few at 3m. or slightly shallower. Probably the relevant difference is that using DX, I didn’t need to remove the dome shade but I didn’t use the lens hood. 

 

Mark

 

Mark whats your opinion the Nikon 8-15mm when compared directly against the Tokina 10-17mm on the Nikon D500?

 

Regards Mark