30 Jun '13

What's the difference between the F Stop and the T Stop number?

A few weeks ago I was looking for the prices for the Samyang 24mm f/1.4 on Amazon, an affordable wide prime lens, when I noticed that just underneath tha lens, it was listed the following lens, the Samyang 24mm T1.5 lens, which is essentially the same lens but for videographers, with a better focus ring. But while it was pretty clear that the T1.5 was related to the max aperture for the lens, I didn't really understand why it was using a weird value (1.5) and why the T and not the usual "f".
The answer is simple: while the f number indicates area of the aperture of the blades, the T value indicates the amount of light that ends on the sensor of our cameras, and because light has to pass through the different pieces of glass in our lens (I didn't want to say lenses of a lens, it sounds weird to me), which reflect and/or absorb light, you will never get the 100% of light transmission, and the T number indicates the real amount of light that ends on the sensor. But as I'm terrible to explain how things works, and I doubt I will ever present an episode of MythBusters, maybe it's better if you just watch the video above, where Matt Granger explains, way better than me, what's the difference between the F Stop and the T Stop number.
(via ThatNikonGuy)

28 Jun '13
Post Title

Time for a new server?

Nerdy moment: I think it's time for a new server. A little guy from far away says "why you don't buy just an external hard drive Alessio?". Because it's not enough. Just to make it clear, I have 3 external hard drives for my first backup, where one is for a general backup, one is for the last year of photos, and one is for all the photos, plus I have an HP microserver (which sound a very expensive thing, but it is not) where it holds 4 hard drives, for a total of 7TB, and where I have a second general copy of all my photos, and this is the current situation of my server space:

93% /media/Tethys
78% /media/Photos2
79% /media/Phoebe
99% /media/Photos

As you can see they are pretty full, and bear in mind that I still have to copy the photos I took in the last month. Another voice from far away says "But why you don't delete the rubbish photos, stuff that you never developed, or that you don't care?". Already done my friend, already done...
So I think it way about time to buy a new server, or at least to replace one of the hard drives with a 3TB hard drive, but it's a temporary solution, so I prefer to, how we say in italy, cut the bull's head, and I'm probably going to buy the newer version of the server I'm using at the moment, which is the HP Proliant Microserver N54L, which I can find if for a little bit over 200 euro, and it's a really good machine.
I know, some of you are thinking "I don't really care... show us more photos!". I'll do, but I'm still working on old photos, and for the moment I don't have anything to show you, apart my beautiful girlfriend:

Hopefully tomorrow I'll find the force to get the fuck out and go to take some snaps, so stay tuned!

27 Jun '13

Photo Release: Public Image LTD

A fellow photographer just sent me a photo of the photo release you have to sign before the show of Public Image Ltd.

As usual, we get a nice copyright grabber line: "These photographs can indefinitely be used by PiL Official Ltd / JRJL Productions for all commercial and non-commercial purposes".
What about no? What about I will never photograph any of your show?

Thanks to Sean Conroy for the photo.

25 Jun '13
Post Title

Different pictures from the same places

Well, as I said, my few days in Italy were quite unproductive, and as I said, many plans but did nothing. To be fair I've a lot of nice pictures of the my girlfriend's family and our pets, but I'm still working on them. But that isn't the topic for this post, but instead I wanted to show you some pictures I took in the past two weeks, but as I can't find new places to photograph, these pictures were taken in the same places I went at the begin of this month: Pigeon Road and Grand Canal Dock.
I'm not 100% convinced about these shots, but to be fair I'm rarely happy with my shots.
Anyway, do any of you would like to suggest me some new places to photograph? Any ideas? Please leave a comment below if you know some cool places around Dublin.

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22 Jun '13