• Log in with Facebook Log in with Twitter
Photo

Sigma 105mm F2.8 macro arrives!


  • Please log in to reply
35 replies to this topic

#21 dave's clichés

dave's clichés

    Advanced Member

  • Members
  • PipPipPip
  • 1,825 posts

Posted 25 January 2018 - 10:02 AM

It's there on Nikon's official site relating to what lenses are fully compatible and which use some of the facilities. I'll try and find it tonight maybe.

 

 

"No, it doesn't. Either you have "competing" lenses which head towards the same memory bank - then paper labels or adjusting one lens to the other come into play. Or one lens is identified  as another - as long as it's consistent, who cares?"

 

   Those who have just mounted their WA Sigma lens which needs say -3  and they get +4 from their tele-zoom and they have to remember to change the AFFT each time they want to mount either of the lenses!



#22 Brightcolours

Brightcolours

    Advanced Member

  • Members
  • PipPipPip
  • 4,897 posts
  • LocationThe Netherlands

Posted 25 January 2018 - 10:12 AM

I never use the release setting in the menu BC! I see it as a way to get more OOF images.
 
    AF-C is continually on as long as you hold down the BBF button where AFS just does the one time.....( I know I don't need to tell you that)...with stationary subjects I have never noticed any difference in AF accuracy.

AF-C will check focus constantly, AF-S will not, and i bet you are using that with the close up Sigma try outs on both cameras. Try MF or AF-C and see the difference.

#23 JoJu

JoJu

    Advanced Member

  • Members
  • PipPipPip
  • 2,973 posts
  • LocationSwitzerland

Posted 25 January 2018 - 10:21 AM

Do it for your own pleasure... so far, I never missed a feature or found a function which was working on a Nikkor lens, but not on a Sigma or Tamron. I'm not saying there are not such lenses. I'm just saying, if I have or had them, I didn't notice any super-secret extra cool gadgets. 

 

On the contrary!

 

Tamron:

  • All lens collars come with Arca-swallow tail.
  • The lenses are very well designed, with metal parts at the spots for the collar
  • 100-400: I've never seen this feature to choose either a dedicated distance zone OR choose a distance limit and the zone results from the position of the focus ring when switching it ON. How cool's that?
  • Tap-in console for future firmware updates, customisations like sensitivity for override manual focus

Sigma:

  • USB dock, same purpose as Tamron's tap-in console
  • lens foot (of 150-600 Sports or 500/4 Sports) as an option, very long and again with Arca profile
  • better rear lens caps than Nikon has
  • Mount change service - if you ever get attracted to Canon...
  • Some lenses are very unique and not available from Nikon or if, then the Sigma's are often delivering better IQ

Nikon:

  • lately some price increases of next generation lenses which really hurt (12k for a 180-400/4 zoom, which was before half price), and I don't see these prices backed up by raising IQ.
  • The105/1.4 G is also very unique, but for that price I could get a Sigma 135/1.8 AND  85/1.4 Art...
  • if lens collars, I only know extremeley wobbly design (300/4 PF E, 70-200/4 G)
  • However, the 300/4 PF E was worth the puchase. In it's range it's the lightest 300 mm I can get.
  • the rear caps suck
  • the front case easily flip out of the fingers


#24 dave's clichés

dave's clichés

    Advanced Member

  • Members
  • PipPipPip
  • 1,825 posts

Posted 25 January 2018 - 05:54 PM

AF-C will check focus constantly, AF-S will not, and i bet you are using that with the close up Sigma try outs on both cameras. Try MF or AF-C and see the difference.

   You've lost your bet BC.    

 

   I pretty much use only AF-C in priority+ (single point focus mode here) + BBF, it was the mode used for testing.   



#25 dave's clichés

dave's clichés

    Advanced Member

  • Members
  • PipPipPip
  • 1,825 posts

Posted 25 January 2018 - 06:07 PM

 JoJu, 

 

            Here's Nikon's focus point availability list with various lenses.....

 

http://nps.nikonimag...f/focus_points/

 

....depending on the lens it shows the available cross point sensors that operate with it!

 

  It's stated that only some Nikon lenses can use the maximum, and I've read that TPMs have to settle for the minimum!



#26 JoJu

JoJu

    Advanced Member

  • Members
  • PipPipPip
  • 2,973 posts
  • LocationSwitzerland

Posted 25 January 2018 - 07:04 PM

And that is what you call full feature?  :blink:

 

How much sense would it make for Nikon to limit the number or properties of focus points to Nikon only? I expect, if a focus point can be chosen, it will work properly - everything else is attempt of betrayal, no? :ph34r:

 

Also, if Nikon is picky for their own lenses as to which points can be used with which Nikkor, you hardly can expect them to treat the competition better - on one side. And on the other side, even as a "Nikkor and nothing else"-fanboy one doesn't get full access to all points - so what's the real benefit of going the Nikon only path?  ^_^

 

What's BBF? Do I understand correctly: For testing and using in-camera-calibration, you're on AF-S? Good man. Just because I also want to be a good man...  :D I use the same. AF-C as standard.



#27 dave's clichés

dave's clichés

    Advanced Member

  • Members
  • PipPipPip
  • 1,825 posts

Posted 25 January 2018 - 07:32 PM

Back button focus.

 

  I very rarely use AF-S!



#28 Brightcolours

Brightcolours

    Advanced Member

  • Members
  • PipPipPip
  • 4,897 posts
  • LocationThe Netherlands

Posted 26 January 2018 - 07:59 AM

You've lost your bet BC.    
 
   I pretty much use only AF-C in priority+ (single point focus mode here) + BBF, it was the mode used for testing.

How do they behave in AF-S? And in AF-C with shutter priority? Not sure if that can be done with BBF



#29 dave's clichés

dave's clichés

    Advanced Member

  • Members
  • PipPipPip
  • 1,825 posts

Posted 26 January 2018 - 09:20 AM

How do they behave in AF-S? And in AF-C with shutter priority? Not sure if that can be done with BBF

 

   As stated BC, as a rule I use AF-C and back button focus in focus priority mode, I never use release mode, I tried it and sure enough it releases the shutter to fire even when poorly focused......frankly I see it as a "paparasse mode" ie. you get  "a"  shot regardless!...........Steve Perry a well know nature photog and Nikon author and expert on AF uses it with BIF, however, then he lives in Florida and there the birds want to sit in your lap they're so tame.

 

   One thing I do find annoying is the D750's shutter button, it's way too sensitive, to the point where when you want to wake up the camera it's difficult not to take a shot,  the net result is I don't want to go near that button unless I want the shot. 

 

   The D5/D500 has changed the way AF can be called upon in so many different ways without taking your eye away from the viewfinder, AF-C)

                                        BBF (AF ON button)-------activates single point focus.

                 

                                         PV button  (front)-----------activates 3D focus.

                                          

                                         FN1 button  (front)----------activates group focus.

 

                                          Center joystick button------auto area mode......this is a huge advantage, when shooting BIF.

 

  It's a slick act and makes other methods of AF selection seem like someone has gone out of their way to make it as awkward as possible.    I believe the D850  has the same system.

 

    On the D750 with the Tammy G2 you have to change your left hand grip, find the AF button by the lens mount, scroll the thumb-wheel, re-change your left hand grip........then shoot! .....hardly on the fly!



#30 dave's clichés

dave's clichés

    Advanced Member

  • Members
  • PipPipPip
  • 1,825 posts

Posted 26 January 2018 - 10:14 AM

And that is what you call full feature?  :blink:

 

How much sense would it make for Nikon to limit the number or properties of focus points to Nikon only? I expect, if a focus point can be chosen, it will work properly - everything else is attempt of betrayal, no? :ph34r:

 

Also, if Nikon is picky for their own lenses as to which points can be used with which Nikkor, you hardly can expect them to treat the competition better - on one side. And on the other side, even as a "Nikkor and nothing else"-fanboy one doesn't get full access to all points - so what's the real benefit of going the Nikon only path?  ^_^

 

 

  I don't know if Nikon's picky-ness is due rather to "technical difficulties" aperture sizes and light, for example the G2 on the D500 can't focus to the extreme high corners of the array at 600mm, but will at 500mm (not with a cross point) , oblique light at smaller apertures prevents it. 

 

  What's the real benefit of using Nikon glass?   Well at least you know that they were designed for Nikon cameras by Nikon, and not reversed engineered to fit Nikon and your getting the maximum AF performance out of your DSLR. 

 

  But then my favourite lens is the G2, it nails AF......and on any Nikon I've put it on.....AFFT always seems to be -2.



#31 JoJu

JoJu

    Advanced Member

  • Members
  • PipPipPip
  • 2,973 posts
  • LocationSwitzerland

Posted 26 January 2018 - 11:43 AM

Today I think one is on the wrong track to conlude, genuine lenses are the best choice. Nikon or Canon or whatever: There are product life cycles, research and development happens every day. Even Nikon can not guarantee that all lenses work best - if you don't believe, check AFMA of a Nikon lens with different distances.

 

Nikon also has "techncial difficulties" and cannot solve all of them perfectly. They also have a big overhead of administration costs and are far away from most customers, ambassadors or other key persons being an exception.

 

The 500 your talking about is f/4? and the 600 G2 f/6.3, if I recall correctly? I don't think that's about Nikon and Tamron, it simply is about the limit of f/5.6.



#32 dave's clichés

dave's clichés

    Advanced Member

  • Members
  • PipPipPip
  • 1,825 posts

Posted 26 January 2018 - 12:31 PM

     I never said that things are perfect or you need to buy Nikon lenses,  otherwise I wouldn't be using the G2 as opposed to the Nikor 200-500mm!

 

  However, you asked me a question which I think that I answered objectively, any manufacturer who designs lenses for his own cameras has a head start advantage......the knowledge of it's own system.

 

                               ........what goes on with TPMs and reverse engineering is another story and we are seeing plenty of great results from those too.

 

    ......but Nikon knows 100% intimately their AF system and doesn't have to compromise things for other mounts........so if they can't get things right.........they only have themselves to blame!

 

   The 600mm and 500mm I was talking about was just about zooming on the same lens, the G2!......

 

       ..........a light gathering issue.



#33 JoJu

JoJu

    Advanced Member

  • Members
  • PipPipPip
  • 2,973 posts
  • LocationSwitzerland

Posted 26 January 2018 - 12:45 PM

Well dave, I work in a machine manufactory. All I can say is that most designeres here are too young to know the machines we made 10, 20, 40 years ago. All grinding machines. The engineers simply do not have the industrial-historic background - so sometimes they make mistakes we already made a decade ago.

 

I do not believe that the designers of a D90 knew which lenses Nikon would produce a decade after the camera introduction, same with 20 year old lenses. We don't see incompatibilities inside, just as a result and then it's already a problem. Or the lenses which were made for a D3, 12 MP, need to resolve and AF with these days nearly 4× higher resolution.

 

I don't know what my employer wll produce in ten years from today, so how could I adjust myself today? That's what I meant with reverse engineering - Sigma or Tamron will analyse both brands and probably know a lot more about Nikon AF than Canon does or vice versa. There's no need to compromise things for other mounts.



#34 dave's clichés

dave's clichés

    Advanced Member

  • Members
  • PipPipPip
  • 1,825 posts

Posted 26 January 2018 - 05:18 PM

 

 

I don't know what my employer wll produce in ten years from today, so how could I adjust myself today? That's what I meant with reverse engineering - Sigma or Tamron will analyse both brands and probably know a lot more about Nikon AF than Canon does or vice versa. There's no need to compromise things for other mounts.

 

 

 

Do the latest Sigma lenses Art, sport and contemporary identify themselves as completely as Nikon ones?

 

Do they now have problems with AFFT getting applied to the appropriate lenses..........or is it necessary to do all AFFTs from the USB dock?

 

   I don't know the answers JoJu, à vous!



#35 JoJu

JoJu

    Advanced Member

  • Members
  • PipPipPip
  • 2,973 posts
  • LocationSwitzerland

Posted 26 January 2018 - 06:07 PM

Sigma lenses are not pretending to be Nikon lenses, but all identify themselves with the proper FL/f numbers

 

Also, in EXIF you will see their names / numbers.

 

The USB-dock is approximately working the same proportion numbers of AFMA (AutoFocus MicroAdjustments). Meaning: It doesn't matter much if you correct the lens only in-camera or use the dock to apply the same correction (and not on camera). It's also possible to correct the lens for all distances and focal lengths (and set in-camera AFMA to 0) and then put it to the next body and just correct the whole system, if necessary.

 

As well as it's possible to do corrections bigger than 20, because both values add. -15 + -12 = -27



#36 dave's clichés

dave's clichés

    Advanced Member

  • Members
  • PipPipPip
  • 1,825 posts

Posted 26 January 2018 - 06:43 PM

   The dock is without a doubt, a blessing!






3 user(s) are reading this topic

0 members, 3 guests, 0 anonymous users



© by photozone.de