Question about Tamron 60mm lens...

12 years 11 months ago #81171 by chasrich
I just read this...
"The Tamron SP AF60mm F/2.0 Di II LD 1:1 Macro (model G005) is the industry’s first medium telephoto macro lens designed for APS-C size digital SLR cameras that features a fast maximum aperture of F/2.0—one stop faster than the F/2.8 maximum aperture found on conventional macro lenses in the same class. The SP AF60mm F/2.0 covers an equivalent angle of view of 93mm when converted to the 35mm format. "

This seems to be in direct contradiction to what I understand about the crop ratio of an APS-C sensor. What am I missing here?

Reference: cgi.ebay.com/Tamron-SP-AF-60mm-F2-Di-II-...65026#ht_2655wt_1138

“Amateurs worry about equipment, professionals worry about money, masters worry about light, I just make pictures… ” ~ Vernon Trent
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12 years 11 months ago #81185 by Johnnie
www.bobatkins.com/photography/tutorials/...eras_and_lenses.html

A good explanation of Full Frame vs APS-C with the conversion factors given. I am totally confused with all of the conversions other than I know that I have 1.6 Crop Canon Camera. So all I do is mulitply. Good luck my friend. :cheers:


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12 years 11 months ago #81321 by MLKstudios
I probably should read the articles first, but...

On a Nikon DX the 60mm becomes a 90mm, which allows you work a bit further back than a 60mm on a full frame. If the lens can do 1:1 full frame, then that is also cropped by the sensor it equals something greater than 1:1.

Did that answer the question?

Matthew :)

Matthew L Kees
MLK Studios Photography School
www.MLKstudios.com
[email protected]
"Every artist, was once an amateur"

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12 years 11 months ago #81399 by chasrich
The part that seems to be a contradiction is where it says... "The SP AF60mm F/2.0 covers an equivalent angle of view of 93mm when converted to the 35mm format". I thought the 35mm format was full frame.

Here is the question - more to the point - "The Tamron SP AF60mm F/2.0 Di II LD 1:1 Macro (model G005) is the industry’s first medium telephoto macro lens designed for APS-C size digital SLR cameras". Does this mean it will be like a 60mm lens on my APS-C camera or more like a 90+mm?

Secondarily, would this make a good alternative to a 50mm f/1.4 or f/1.8?

“Amateurs worry about equipment, professionals worry about money, masters worry about light, I just make pictures… ” ~ Vernon Trent
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12 years 11 months ago - 12 years 11 months ago #81403 by MLKstudios
The first part is saying that the field of view narrows because the chip is smaller. It has the "field of view" of a 90mm (or 93mm) lens mounted on a film camera (35mm film). The true focal length of the lens is still 60mm.

And yes, it would be a good alternative if you like to get in close. A 50mm would give you the same field of view of a 75mm lens, so it is only slightly more "telephoto".

Matthew :)

PS my guess is that it doesn't cover a full frame chip (or film frame) and is why they say "designed for APS-C".

Matthew L Kees
MLK Studios Photography School
www.MLKstudios.com
[email protected]
"Every artist, was once an amateur"

,
12 years 11 months ago #81407 by chasrich
It must be the wording that I'm questioning. Thanks Mathew. You confirmed my opinion about the relationship.

“Amateurs worry about equipment, professionals worry about money, masters worry about light, I just make pictures… ” ~ Vernon Trent
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12 years 11 months ago - 12 years 11 months ago #81411 by MLKstudios
Glad to help.

Don't know why I was thinking you were Nikon. The Canon 1.6x factor adds those extra 3mm, and makes the 50mm closer to the field of view of an 80mm lens.

Matthew :)

Matthew L Kees
MLK Studios Photography School
www.MLKstudios.com
[email protected]
"Every artist, was once an amateur"

,

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