Shutters Inc » Episode 386 – The Lior interjection - The world's best loved photography podcast


October 1, 2017

Episode 386 – The Lior interjection

Filed under: Podcast,Shutters Inc — Bruce Williams @ 12:00

First up, apologies for the absolutely awful audio quality.
We really need to get Glynn onto a wired internet connection!

This week, a Japanese artist layers 100s of photos taken over time to produce stunning multidimensional landscapes. Kind of a new take on the timelapse.

If you got yourself a new iPhone, you’ll probably want to convert some of those .heic images to .jpg, and thankfully, this site will help with that.

Carl told us about his friend, David Collopy, who has a collection of “Then and now” images of Melbourne. Check them out here.
Other media coverage here.

Steve Peters liked this article about the rise of iPhone credits in commercial photography, and what this means for photographers.
He also told us about Nikon being in the spotlight over sexism row,
we are NOT mentioning this,
Nikon is making a full-frame mirrorless camera,
and the NYC photographer who lost the only copy of wedding photos on subway.

Adam sent us this story about the Phase One 190mp aerial system,
and this one about Canon’s new ‘virtual camera’ tech.

Rob Coates sent us the link to this amazing video of 30 days in the life of a container ship.

Lior wrote in to set me straight (again) about 10 stop filters.

Hi Bruce,
I’m a long (long) time listener and I just finished listening to episode 384 (the Reg Vardy one).

You talked about a method of computing long exposure times by setting the ISO to 6400, measuring exposure, and then setting the ISO to 100 and exposing for minutes instead of seconds. You said that the system does not work because there are 7 stops between ISO 100 and ISO 6400, and you were using a 10-stop filter.

Well, there are 6 stops between those ISOs (2^6 = 64). And that method does work – it’s just that you need to use ISO 6400 and ISO 100 under the same conditions. In other words, if your measured exposure time at ISO 6400 was 5 seconds with the ND filter on, then it will be 5 minutes at ISO 100, again with the ND filter.
If it was 0.5 seconds without the ND filter at ISO 6400, then it will be 30 seconds at ISO 100, again, without the ND filter. The ND filter only changes the exposure times, not the ratio between them.

Using ISO 6400 enables you to quickly gauge exposure (using the histogram), white balance, exposure, focus, etc., before committing to a very long exposure at ISO 100.

Note that with a 10-stop ND filter the exposure time difference is likely to be x120, not x60, because at ISO 100 the exposure time will probably be longer than 1s, triggering dark frame subtraction which takes the same time as your exposure.

I hope I helped,
Thanks for a great podcast,
Leo from Israel

And Glynn brought to our attention that Manfrotto just bought both Joby and Lowepro for what seems like a crazy bargain-basement price of $10.3M.

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