Rota das Cascatas - Vila de Rei
Para explorar e fotografar - aprox. 10km / 4h a pé.
Descrição, fotos e vídeo de um passeio aqui:
http://porfragasepragas.blogspot.pt/2014/02/cascatas.html
sexta-feira, junho 19, 2015
quarta-feira, junho 03, 2015
Macro Photography, using extension tubes
Extension tubes
"
The cheapest tube set with electric contacts is about $60 to $70 I understand. At least, it was that a couple of months ago, although prices may have gone up by now. Just check Amazon or the B&H site. For a good set but more expensive, get a Kenko 3 tube set (plastic), and if you want metal the only option is Canon. However, with a 40 mm you could just get away with a 12 mm tube to begin with anyway. As this lens has an MFD of 25 cm, a 12 mm tube at MFD will give you a new MFD of approximately 175 mm with 113 mm WD and a magnification of 1:0.55, or slightly better than half size. A 25 mm tube 161 mm MFD, 86 mm WD, and magnification of 1:0.875. A 30 mm tube will provide you with 1:1 for this lens.
"
"
The most important aspect of having tubes with contacts is the ability to control the aperture on an EF or EF-S lens."
"
The cheapest tube set with electric contacts is about $60 to $70 I understand. At least, it was that a couple of months ago, although prices may have gone up by now. Just check Amazon or the B&H site. For a good set but more expensive, get a Kenko 3 tube set (plastic), and if you want metal the only option is Canon. However, with a 40 mm you could just get away with a 12 mm tube to begin with anyway. As this lens has an MFD of 25 cm, a 12 mm tube at MFD will give you a new MFD of approximately 175 mm with 113 mm WD and a magnification of 1:0.55, or slightly better than half size. A 25 mm tube 161 mm MFD, 86 mm WD, and magnification of 1:0.875. A 30 mm tube will provide you with 1:1 for this lens.
"
"
The most important aspect of having tubes with contacts is the ability to control the aperture on an EF or EF-S lens."
Subscrever:
Mensagens (Atom)