Comments on: Maximum Aperture of the Nikon 18-200mm Throughout its Zoom Range http://regex.info/blog/2006-10-05/263 Not a photo blog. A personal blog with photos. Tue, 07 Feb 2012 15:03:59 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: Michael Erlewine http://regex.info/blog/2006-10-05/263#comment-37682 Michael Erlewine Sun, 27 Dec 2009 14:00:52 +0000 http://regex.info/blog/2006-10-05/263#comment-37682 When I was shooting DX cameras, thanks to my naivety and the recommendation of this lens by Ken Rockwell (Kenrockwell.com), I eagerly picked up a copy of the Nikkor 18-200. I found it was “not sharp,” in particular at the long end of the throw… 200mm or thereabouts. After a time, I figured I had a bad copy and sent it back to Nikon under warranty. They checked it out and sent it back as “working perfectly,” so I happily starting taking photos with it again. But, alas, I encountered the same problem: too soft focus and not really tack sharp, in particular at the longer end. Since that time, many users have reported the same problem. That was some time ago and as I gradually progressed in cameras from the D1x, D100, D200, D300, D700, to the D3s I came to understand that I am particular interested in sharp lenses, and I have studied them much like you study all the areas you have. I have (happy to say) now found lenses that are really sharp and am using them. I sold my 18-200mm Nikkor long ago. As pointed out, this is a ‘convenience’ lens that trades compromises in lens quality for that convenience – perfectly understandable. However, one does not have to be a pro to want sharp focus. <span class='jfriedl'>Every lens is a compromise of some sort... the moral of the story is to understand what those compromises are, and what's important to you in any given situation. I've used the 18-200 just once in the last year, on a trip to Disneyland where luggage was really limited. That was a situation where the "important to me" ended up selecting that lens, and I'm glad I had it at my disposal. The other 500 times I made a lens selection last year, it came up shorter than other lenses I have. —Jeffrey</span> When I was shooting DX cameras, thanks to my naivety and the recommendation of this lens by Ken Rockwell (Kenrockwell.com), I eagerly picked up a copy of the Nikkor 18-200. I found it was “not sharp,” in particular at the long end of the throw… 200mm or thereabouts. After a time, I figured I had a bad copy and sent it back to Nikon under warranty. They checked it out and sent it back as “working perfectly,” so I happily starting taking photos with it again. But, alas, I encountered the same problem: too soft focus and not really tack sharp, in particular at the longer end. Since that time, many users have reported the same problem.

That was some time ago and as I gradually progressed in cameras from the D1x, D100, D200, D300, D700, to the D3s I came to understand that I am particular interested in sharp lenses, and I have studied them much like you study all the areas you have. I have (happy to say) now found lenses that are really sharp and am using them. I sold my 18-200mm Nikkor long ago. As pointed out, this is a ‘convenience’ lens that trades compromises in lens quality for that convenience – perfectly understandable. However, one does not have to be a pro to want sharp focus.

Every lens is a compromise of some sort… the moral of the story is to understand what those compromises are, and what’s important to you in any given situation. I’ve used the 18-200 just once in the last year, on a trip to Disneyland where luggage was really limited. That was a situation where the “important to me” ended up selecting that lens, and I’m glad I had it at my disposal. The other 500 times I made a lens selection last year, it came up shorter than other lenses I have. —Jeffrey

]]> By: Tony Bennett http://regex.info/blog/2006-10-05/263#comment-37362 Tony Bennett Mon, 23 Nov 2009 11:08:10 +0000 http://regex.info/blog/2006-10-05/263#comment-37362 A most interesting test report and subsequent discussion. I agree that this lens is unsuitable for professional work for all the reasons outlined. Distortion is a major problem and to a large extent can be corrected in post-processing. This can be very time consuming and Photoshop fails to correct complex distortion (wave-effects on horizontal lines at short focal lengths). I use this lens most of the time. When I decide to use an image for printing and presentation I pass it through DxO Pro, a raw converter that corrects all distortion and other faults attributable to BOTH the lens AND the camera body in combination. I like to think I'm elevating a consumer lens to a pro-quality lens. Of course I'm not, but the result is a vast improvement and an excellent foundation for refinement in Photoshop. I would be interested in the views of other DxO users. I would like to say that I have no commercial interest in DxO; I'm just a satisfied user. Tony (UK) A most interesting test report and subsequent discussion.

I agree that this lens is unsuitable for professional work for all the reasons outlined. Distortion is a major problem and to a large extent can be corrected in post-processing. This can be very time consuming and Photoshop fails to correct complex distortion (wave-effects on horizontal lines at short focal lengths).

I use this lens most of the time. When I decide to use an image for printing and presentation I pass it through DxO Pro, a raw converter that corrects all distortion and other faults attributable to BOTH the lens AND the camera body in combination. I like to think I’m elevating a consumer lens to a pro-quality lens. Of course I’m not, but the result is a vast improvement and an excellent foundation for refinement in Photoshop. I would be interested in the views of other DxO users.

I would like to say that I have no commercial interest in DxO; I’m just a satisfied user.

Tony (UK)

]]> By: Ron Cork http://regex.info/blog/2006-10-05/263#comment-34663 Ron Cork Tue, 10 Mar 2009 00:37:05 +0000 http://regex.info/blog/2006-10-05/263#comment-34663 This is an interesting lens. I bought one just after its release with the proviso that my friend who was with me, would be happy to buy it from me if I didn't like it. He became the owner of it two weeks later. I shoot fast and this lens focuses way too slowly for me. I had felt uncomfortable with this lens during some wedding shoots, with being able to pin it down to one thing (apart from the slow focusing issue). Later, when I checked various review sites, I discovered the reasons I was dissatisfied... the amount of distortion, at various focal lengths, was staggering. The worse section being the most-used mid-range of the zoom. Sadly, (and this applies to a few Nikon lenses), it was a good idea that didn't come off. I suppose for general, non-critical uses, it performs to its price range. You get what you pay for. <span class='jfriedl'>Your criticisms are valid, but I think more than "you get what you pay for" it should be "know what you're getting when you pay". Even when it came out, prior to people having hands-on experience, a lot of people would think you're crazy to use a lens like this for a wedding (as a pro, not a guest). With so much going for it in zoom range and its compact size, you know (or <i>should know</i>) that compromises will have been made elsewhere. People call this a great all-around walk-about lens because for most people on a casual stroll, the barrel distortion is a small price to pay for such a huge zoom range in such a small lens. —Jeffrey</span> This is an interesting lens. I bought one just after its release with the proviso that my friend who was with me, would be happy to buy it from me if I didn’t like it. He became the owner of it two weeks later. I shoot fast and this lens focuses way too slowly for me.

I had felt uncomfortable with this lens during some wedding shoots, with being able to pin it down to one thing (apart from the slow focusing issue). Later, when I checked various review sites, I discovered the reasons I was dissatisfied… the amount of distortion, at various focal lengths, was staggering. The worse section being the most-used mid-range of the zoom.

Sadly, (and this applies to a few Nikon lenses), it was a good idea that didn’t come off.

I suppose for general, non-critical uses, it performs to its price range. You get what you pay for.

Your criticisms are valid, but I think more than “you get what you pay for” it should be “know what you’re getting when you pay”. Even when it came out, prior to people having hands-on experience, a lot of people would think you’re crazy to use a lens like this for a wedding (as a pro, not a guest). With so much going for it in zoom range and its compact size, you know (or should know) that compromises will have been made elsewhere. People call this a great all-around walk-about lens because for most people on a casual stroll, the barrel distortion is a small price to pay for such a huge zoom range in such a small lens. —Jeffrey

]]> By: Scott Wheeler http://regex.info/blog/2006-10-05/263#comment-34569 Scott Wheeler Mon, 02 Mar 2009 20:41:22 +0000 http://regex.info/blog/2006-10-05/263#comment-34569 While f-stop is the right way to compare two lenses for depth of field, it may be misleading for comparing the amount of light gathered (i.e. how fast the lens is). The <a href="http://photonotes.org/cgi-bin/photo-entry.pl?id=Tstop" rel="nofollow">t-stop</a> would be appropriate for this. The t-stop is never better than the f-stop, frequently worse, and getting a good t-stop is probably why the 17-55mm is so large. Unfortunately Nikon et al. never publish or record the t-stop! While f-stop is the right way to compare two lenses for depth of field, it may be misleading for comparing the amount of light gathered (i.e. how fast the lens is). The t-stop would be appropriate for this. The t-stop is never better than the f-stop, frequently worse, and getting a good t-stop is probably why the 17-55mm is so large. Unfortunately Nikon et al. never publish or record the t-stop!

]]> By: Gerardo Toyloy http://regex.info/blog/2006-10-05/263#comment-33766 Gerardo Toyloy Sat, 10 Jan 2009 22:27:29 +0000 http://regex.info/blog/2006-10-05/263#comment-33766 Hi how are you? Thank you for the information. Your Website is amazing full of information and your photos are extraordinary. Thank you. Hi how are you? Thank you for the information. Your Website is amazing full of information and your photos are extraordinary. Thank you.

]]> By: Joe http://regex.info/blog/2006-10-05/263#comment-23340 Joe Sat, 18 Oct 2008 02:21:19 +0000 http://regex.info/blog/2006-10-05/263#comment-23340 A very useful analysis indeed. But how does the VRII feature play into this ? > I see that the 18-200mm is f/4.6 at 50mm, which is just about 1/3rd stop slower than > f/4.0 (which is 3 stops slower than f/1.4 Nikon claims that VRII gives you the equivalent of 3-4 stops. If that's the case, doesn't that mean the 18-200 at 50mm zoom can shoot in the same lighting conditions as the 50mm f/1.4 ? thanks, Joe A very useful analysis indeed. But how does the VRII feature play into this ?

> I see that the 18-200mm is f/4.6 at 50mm, which is just about 1/3rd stop slower than
> f/4.0 (which is 3 stops slower than f/1.4

Nikon claims that VRII gives you the equivalent of 3-4 stops. If that’s the case, doesn’t that mean the 18-200 at 50mm zoom can shoot in the same lighting conditions as the 50mm f/1.4 ?

thanks,
Joe

]]> By: Phil Harvey http://regex.info/blog/2006-10-05/263#comment-18932 Phil Harvey Thu, 24 Jul 2008 19:13:52 +0000 http://regex.info/blog/2006-10-05/263#comment-18932 A very useful analysis. Thanks Jeffrey! A very useful analysis. Thanks Jeffrey!

]]> By: Stefan http://regex.info/blog/2006-10-05/263#comment-2903 Stefan Wed, 20 Dec 2006 10:04:41 +0000 http://regex.info/blog/2006-10-05/263#comment-2903 My 18-200 VR arrived with focusing problems, so I've sent it to Nikon for repair. What I've found the greatest issue with this lens is the HUGE depth-of-field (a result of comparatively high F-numbers). Since shooting with this lens wide open won't yield the best of results, stepping further down from F3.5 @ 18mm to say F5.6 will give you a tremendous depth-of-field (whether this is a problem or not depends of your subject, but not having a choice is annoying). Apart from that, shutter speeds are (in most situations) counter-acted by VR, and I've found this lens to be good fun in most relaxed situations. If under pressure - such as at a wedding - my guess is that you'd be better off with the 12-24. If you've got the money... My 18-200 VR arrived with focusing problems, so I’ve sent it to Nikon for repair. What I’ve found the greatest issue with this lens is the HUGE depth-of-field (a result of comparatively high F-numbers). Since shooting with this lens wide open won’t yield the best of results, stepping further down from F3.5 @ 18mm to say F5.6 will give you a tremendous depth-of-field (whether this is a problem or not depends of your subject, but not having a choice is annoying). Apart from that, shutter speeds are (in most situations) counter-acted by VR, and I’ve found this lens to be good fun in most relaxed situations. If under pressure – such as at a wedding – my guess is that you’d be better off with the 12-24. If you’ve got the money…

]]> By: Simon P. Chappell http://regex.info/blog/2006-10-05/263#comment-2585 Simon P. Chappell Fri, 06 Oct 2006 17:50:49 +0000 http://regex.info/blog/2006-10-05/263#comment-2585 At this time I have no desire to get a larger zoom than than the "something to 70" that came with my D70, but I also had a need for a faster lens (for indoor photography at church events). I purchased the Nikkor f/1.8 50mm lens (very reasonably priced at less than $150) and so far initial tests show that it is indeed noticably faster. I may try the same tests on my 12-24 wide angle. That sounds like a fun weekend project. :-) At this time I have no desire to get a larger zoom than than the “something to 70″ that came with my D70, but I also had a need for a faster lens (for indoor photography at church events). I purchased the Nikkor f/1.8 50mm lens (very reasonably priced at less than $150) and so far initial tests show that it is indeed noticably faster.

I may try the same tests on my 12-24 wide angle. That sounds like a fun weekend project. :-)

]]> By: Joe http://regex.info/blog/2006-10-05/263#comment-2583 Joe Thu, 05 Oct 2006 13:25:07 +0000 http://regex.info/blog/2006-10-05/263#comment-2583 It's interesting, Jeffrey, thanks. I used this lens yesterday in a low light situation (Q+A after a film presentation in a Museum setting) and found the VR really useful -- more so that I expected. While I like this lens as a walk-around -- especially in good light -- I too am seriously considering a faster zoom in the wide end of the range (I already have the 70-200VR). It’s interesting, Jeffrey, thanks.

I used this lens yesterday in a low light situation (Q+A after a film presentation in a Museum setting) and found the VR really useful — more so that I expected.

While I like this lens as a walk-around — especially in good light — I too am seriously considering a faster zoom in the wide end of the range (I already have the 70-200VR).

]]>