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raider · 09-19-2011, 04:33 PM

Hi, first off, not a troll post. And I m also not discussing the merits of either lenses. I m just after the FOV shots of both lenses in the *same scene*.

If anyone cares to post some photos I will be most grateful.

Thanks

**pacerr** · 09-19-2011, 05:01 PM

Focal length comparison tool, Tamron USA

SpecialK · 09-19-2011, 07:03 PM

After several attempts at mousing to 14, I'm convinced the scale omits 14 (as well as some other values). Still handy though.

steve1307 · 09-19-2011, 07:56 PM

Cant help you with comparison as I don't have the 14mm.

I can give you the maths though. Hope I haven't c*cked it up?!

If the subject is 1000 (units, mm, inches. whatever) from the focus plane than the image plane size would be:

14mm gives 1648 x 1099 units.
15mm gives 1537 x 1024 units (this is 6.7% smaller in linear dimension, or 13.1% smaller image area.

Now if you have the 15mm on and you move futher from the subject by 67 (units) then i guess you will have the same view as the 14mm lens.

Really I guess the main difference is the whole extra stop of light available to the 14mm.

**pacerr** · 09-19-2011, 08:37 PM

Originally posted by SpecialK

After several attempts at mousing to 14, I'm convinced the scale omits 14 (as well as some other values). Still handy though.

Select the SP AF10-24 lens. The sliders are pre-set/limited by the lens FL selected.

Originally posted by steve1307

Really I guess the main difference is the whole extra stop of light available to the 14mm.

And the angular FoV. The apparent change in FoV is increasingly greater at UWA FLs; e.g., the 1mm difference beytween 14- and 15mm is 1/15th of the total while 1mm at 150mm changes the FoV by only 1/150th.

H2

raider · 09-24-2011, 05:46 PM

Okay. I googled and googled and finally i found something which answers my question.

This is the link in case anyone is interested to see the FOV between a DA14 and DA15.

This is a chinese webpage. The translated version is -> DA15 vs DA14 vs Sigma 10-20

steve1307 · 09-24-2011, 10:05 PM

Ha ha. that's copied from an old post on dpreview by Dominique "tcom" a forum member here too.

(He's since removed the picture files from his flickr so the links dont come up though.)

09-19-2011, 04:33 PM	#1
raider Veteran Member Join Date: Jul 2007 Location: Perth, Australia Photos: Gallery Posts: 1,989	Request of FOV shots for DA14 and DA15 Hi, first off, not a troll post. And I m also not discussing the merits of either lenses. I m just after the FOV shots of both lenses in the same scene. If anyone cares to post some photos I will be most grateful. Thanks

09-19-2011, 08:37 PM	#5
pacerr Loyal Site Supporter Join Date: Jan 2008 Location: Paris, TN Photos: Gallery \| Albums Posts: 3,350	Originally posted by SpecialK After several attempts at mousing to 14, I'm convinced the scale omits 14 (as well as some other values). Still handy though. Select the SP AF10-24 lens. The sliders are pre-set/limited by the lens FL selected. Originally posted by steve1307 Really I guess the main difference is the whole extra stop of light available to the 14mm. And the angular FoV. The apparent change in FoV is increasingly greater at UWA FLs; e.g., the 1mm difference beytween 14- and 15mm is 1/15th of the total while 1mm at 150mm changes the FoV by only 1/150th. H2 Last edited by pacerr; 09-19-2011 at 08:46 PM.

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09-19-2011, 05:01 PM	#2
pacerr Loyal Site Supporter Join Date: Jan 2008 Location: Paris, TN Photos: Gallery \| Albums Posts: 3,350	Focal length comparison tool, Tamron USA

09-19-2011, 07:03 PM	#3
SpecialK Pentaxian Join Date: Dec 2006 Location: So California Photos: Gallery Posts: 16,482	After several attempts at mousing to 14, I'm convinced the scale omits 14 (as well as some other values). Still handy though.

09-19-2011, 07:56 PM	#4
steve1307 Veteran Member Join Date: Mar 2010 Location: Sydney Photos: Gallery \| Albums Posts: 1,130	Cant help you with comparison as I don't have the 14mm. I can give you the maths though. Hope I haven't c*cked it up?! If the subject is 1000 (units, mm, inches. whatever) from the focus plane than the image plane size would be: 14mm gives 1648 x 1099 units. 15mm gives 1537 x 1024 units (this is 6.7% smaller in linear dimension, or 13.1% smaller image area. Now if you have the 15mm on and you move futher from the subject by 67 (units) then i guess you will have the same view as the 14mm lens. Really I guess the main difference is the whole extra stop of light available to the 14mm.

09-24-2011, 05:46 PM	#6
raider Veteran Member Join Date: Jul 2007 Location: Perth, Australia Photos: Gallery Posts: 1,989 Original Poster	Okay. I googled and googled and finally i found something which answers my question. This is the link in case anyone is interested to see the FOV between a DA14 and DA15. This is a chinese webpage. The translated version is -> DA15 vs DA14 vs Sigma 10-20

09-24-2011, 10:05 PM	#7
steve1307 Veteran Member Join Date: Mar 2010 Location: Sydney Photos: Gallery \| Albums Posts: 1,130	Ha ha. that's copied from an old post on dpreview by Dominique "tcom" a forum member here too. (He's since removed the picture files from his flickr so the links dont come up though.)

Request of FOV shots for DA14 and DA15

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