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FX lens for a DX body
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Dec 5, 2016 15:53:04   #
Kissel vonKeister Loc: Georgia
 
GoofyNewfie wrote:
Which lenses do you have?
They used to make really crappy lenses but I love my old(er) version of the 50-150 2.8 for DX.
Have two of those at work and they are as well built as Nikon top of the line.

Welcome to the 'hog!


No argument there. Sigma lens quality has been highly variable, but now they are mechanically poor. Mine were (are) the 28mm f1.8 with the Sukiyaki (or whatever they called it) cladding on the body. Optically very good except it won't quite focus all the way to infinity on my D7000 body and I can't hold it because the Banzai (or whatever they called it) cladding has turned to goo. Sigma wouldn't fix it. The other was an 80-200 zoom that fell apart internally. In both cases Sigma sent them back with the message "no longer serviced". I wouldn't have any Sigma lens, even as a gift.

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Dec 5, 2016 15:56:49   #
Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)
 
oldtigger wrote:
now gene, why do you always have to insert reality into the discussion?


I have no idea what came over me . . . Sorry

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Dec 5, 2016 16:02:01   #
GoofyNewfie Loc: Kansas City
 
Kissel vonKeister wrote:
No argument there. Sigma lens quality has been highly variable, but now they are mechanically poor. Mine were (are) the 28mm f1.8 with the Sukiyaki (or whatever they called it) cladding on the body. Optically very good except it won't quite focus all the way to infinity on my D7000 body and I can't hold it because the Banzai (or whatever they called it) cladding has turned to goo. Sigma wouldn't fix it. The other was an 80-200 zoom that fell apart internally. In both cases Sigma sent them back with the message "no longer serviced". I wouldn't have any Sigma lens, even as a gift.
No argument there. Sigma lens quality has been hig... (show quote)


They seem to have a lot of models and keep coming out with more...maybe too many to support?
I just have the 2 50-150's and a 10-20 for my DX bodies.

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Dec 5, 2016 16:03:43   #
Gene51 Loc: Yonkers, NY, now in LSD (LowerSlowerDelaware)
 
whitewolfowner wrote:
To word this correctly, any lens on a DX camera will give you the magnification of 1.5X, but a 50mmm lens will not act like a 75mm, because, yes, you get the magnification, but the perspective is still that of a 50mm lens. Think of it this way and the proportions are not accurate but for understanding. Putting a 50mm lens on a DX camera is like putting the 50mm on an FX lens and blowing the photo up to an 8 X 10 photo. Now take that 8 X 10 and cut it down to say a 5 X 7 photo. It has a smaller angle of view and appears to have the telephoto effect, but the perspective is still that of a 50mm lens.
To word this correctly, any lens on a DX camera wi... (show quote)


Magnification of a 75 mm lens remains the same regardless of whether it is on a crop sensor or a 4x5 camera. Only the field of view will change to give the appearance of magnification. Using a cropped sensor camera is no different than cropping the image in post processing from a magnification or perspective point of view. Of course, if both the cropped camera and the full frame camera have the same megapixel count, there will be a loss of image quality when you crop the full frame image to match the same sensor area as the cropped camera. Depth of field and magnification do not change, ever when you crop the sensor. The only time the magnification and perspective changes is when you move closer or further away, and/or use a different focal length.

I write this for the benefit of others that may read what you wrote and get confused - I sure was, and I read it several times.

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Dec 5, 2016 16:59:15   #
CatMarley Loc: North Carolina
 
Kissel vonKeister wrote:
Perspective has nothing to do with lens focal length. It's a function of camera-to-subject distance.

Of course! Focal length has only to do with the angle of view - the longer the length the narrower the angle.

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Dec 5, 2016 17:29:33   #
Paul Chefurka Loc: Canada
 
Kissel vonKeister wrote:
I wouldn't have any Sigma lens, even as a gift.

In that case you might be missing out on one heck of a gift. Sigma's "Art" series lenses are not your grandfather's Sigmas, they are whole other kettle of carp. Every Art series lens I've handled is better made than the Nikon equivalent. I traded a Nikon 17-55/2.8 DX for my 18-35/1.8 Sigma, and it makes the Nikkor feel seriously underbuilt as well as putting it in the shade optically. I was staying away from third-party lenses just like you - Nikkors only, please - until I started doing some reading. I discovered that time has marched on, and so has Sigma.

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Dec 5, 2016 18:07:07   #
DalerDad73
 
Paul Chefurka wrote:
In that case you might be missing out on one heck of a gift. Sigma's "Art" series lenses are not your grandfather's Sigmas, they are whole other kettle of carp. Every Art series lens I've handled is better made than the Nikon equivalent. I traded a Nikon 17-55/2.8 DX for my 18-35/1.8 Sigma, and it makes the Nikkor feel seriously underbuilt as well as putting it in the shade optically. I was staying away from third-party lenses just like you - Nikkors only, please - until I started doing some reading. I discovered that time has marched on, and so has Sigma.
In that case you might be missing out on one heck ... (show quote)

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Dec 5, 2016 18:08:38   #
DalerDad73
 
very happy with my Sigma 17-70; great replacement for my kit 18-55

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Dec 5, 2016 19:32:52   #
imagemeister Loc: mid east Florida
 
beckleybunch wrote:
Would you purchase a Sigma 50mm f1.4 art series lens for a DX body? I don't understand all the technical lingo- I'm educating myself here. I don't want to spend the money it it won't work well with my camera. I understand that I have a cropped frame camera 7200 (now 😓) but what are the reasons you would or wouldn't purchase it (or what lens you buy instead?) The reason I'm asking is because another photographer told me it was his FAVORITE lens by far and since it's Christmas I'm buying myself SOMETHING. Would I be better buying a ff body (used 700) or the lens for my cropped frame? If I had to pick just one? Thank you for your patience and advice.
Would you purchase a Sigma 50mm f1.4 art series le... (show quote)


If you really want to do yourself a favor - get the Sigma 50-100 f1.8 and forget FF.

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Dec 5, 2016 20:36:40   #
Kissel vonKeister Loc: Georgia
 
Paul Chefurka wrote:
In that case you might be missing out on one heck of a gift. Sigma's "Art" series lenses are not your grandfather's Sigmas, they are whole other kettle of carp. Every Art series lens I've handled is better made than the Nikon equivalent. I traded a Nikon 17-55/2.8 DX for my 18-35/1.8 Sigma, and it makes the Nikkor feel seriously underbuilt as well as putting it in the shade optically. I was staying away from third-party lenses just like you - Nikkors only, please - until I started doing some reading. I discovered that time has marched on, and so has Sigma.
In that case you might be missing out on one heck ... (show quote)


This guy is strange looking, but he really knows photo hardware. This is worth a look:

https://www.youtube.com/watch?v=OqGBpFDV--E

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Dec 5, 2016 20:43:31   #
Kissel vonKeister Loc: Georgia
 
I have off-brand lenses. Tokina seems the best choice. They make lenses for almost everybody except Leica. That includes almost all the Pentax Super Takumars, and Nikon long zooms. Had an interesting conversation with a regional manager of THK who told me that. I believed it, given the fact that I have a Tokina 80-400 that is IDENTICAL to the equivalent Nikon. Nikon is too small a company to make all the lenses that bear their name.

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Dec 5, 2016 21:36:18   #
Sinewsworn Loc: Port Orchard, WA
 
portcragin wrote:
Check out the 35 and 50MM 1.8 Nikon Lenses. Excellent lenses and quite reasonable. I have found 1.8 to take care of my needs. I shoot with a D7100 body.

Good shooting,


My 35mm f1.8 is tack sharp, lightweight and available new for under $200.00.


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Dec 5, 2016 23:34:08   #
Abo
 
beckleybunch wrote:
Would you purchase a Sigma 50mm f1.4 art series lens for a DX body? I don't understand all the technical lingo- I'm educating myself here. I don't want to spend the money it it won't work well with my camera. I understand that I have a cropped frame camera 7200 (now 😓) but what are the reasons you would or wouldn't purchase it (or what lens you buy instead?) The reason I'm asking is because another photographer told me it was his FAVORITE lens by far and since it's Christmas I'm buying myself SOMETHING. Would I be better buying a ff body (used 700) or the lens for my cropped frame? If I had to pick just one? Thank you for your patience and advice.
Would you purchase a Sigma 50mm f1.4 art series le... (show quote)


A Nikkor AF D 50mm f1.4 is about $200 new. The only down side to that lens is if it is wide open
and there is a sharp light edge next to a sharp dark edge you get "Chromatic aberration".... fringing at those boarders.
Otherwise, my example of that lens is sensational.

These were shot with my f1:4 50mm AF-D: on a Nikon D700. On your D7000/7100 the angle of view will be tighter,
but the perspective, I do believe, will be the same.

http://static.uglyhedgehog.com/upload/2015/8/26/1440639744417-bic_on_knob.jpg

http://static.uglyhedgehog.com/upload/2015/5/8/1431066295002-hp2r_super_charg_022.jpg

http://static.uglyhedgehog.com/upload/2015/4/24/1429866916917-begonia_crop_018.jpg FYI, This has been cropped

http://static.uglyhedgehog.com/upload/2014/6/27/1403852258354-ecie_vnx.jpg This is a fairly heavy crop too.

Having said all that, if you want to shoot wide open, the Sigma is the way to go... no doubt.... Keeping in mind that you'll
be paying about 4 times more for the Sig'.

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Dec 6, 2016 06:22:13   #
whitewolfowner
 
Apaflo wrote:
The perspective of a 75mm lens is exactly the same as the perspective of a 50mm lens... because neither focal length has a perspective!



Not true, every focal length has its own perspective; its a physical characteristic of optics.

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Dec 6, 2016 06:24:24   #
whitewolfowner
 
CatMarley wrote:
Perspective IS the angle of view except for the distortion. One of these is a crop of a photo taken at 18mm (crop sensor) the other is a crop of a photo taken at 55 mm. Can you see a difference in perspective? No, because the angle of view is the same.



You can't see it? The objects in the distance at 55mm appear to be closer to the chair; the 18mm shot makes the room look larger and more 3 dimensional.

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