First off, I am not going to get all heated up about this, you have your opinion and I can respect that, but that said I do have a few comments to add.
These camments are based on personal preferences, experience, opinion and what I do, not a general this is the universal truth kind of thing.
Call it a different viewpoint.
Originally posted by Gooshin because in todays world a point and shoot can be configured both in studio setup and in daylight to produce images on par if not indistinguishable from those of expensive DSLR cameras.
especially for 1200X1000 resolutions and lower
even 8X10 prints one would be hardpressed to see the difference
viewing images at 1X1 pixels, while informative, is pointless, since no one does it in real life.
you do not walk up to a poster and look at it from 2 inches awaway.
the only way left to differentiate your SLR work from point and shoots is creative depth of field control, and excel at night shots, both of which require fast glass.
F3.5 on an 18 mm means a very short hyperfocal distance, unless you're shooting someone 5 or 6 feet away from you, you might as well be using a point and shoot.
I respectufully disagree, unless you can find me a point and shoot that goes to 18mm in 35mm equivalent terms.
Now again there is tonality, colour reproduction, Dynamic range, noise etc. where there will be differences and visible ones.
But above all there is the optical difference between the two sensor sizes and lenses used that you just cannot get around with a compact regardless of quality.
and please, hyperfocal distance is a tool I rarely use and yes I am shooting a lot of landscapes, there are a number of different ways to focus aside from hyperfocal distance. Esecially if you print large, hyper focal distance standard is optimised for small prints, not large prints and there is a difference between having certain parts of a landscape in critical focus and within an acceptable focus range.
Originally posted by Gooshin okay please describe a situation and end product (work/art) in which a F3.5 18mm lens will be superior to anything else on the market.
well I can for my application a landscape situation where I will be using a combination of grad ND's, a polarizer and long exposures, for these kind of situations I prefer manual focus lenses as i do for landscape work in general.
To me a manual focus lens will be better than any AF lens in such a situation. YMMV, but we are down to personal preference and tools of choice.
But please do not dismiss my tool off choice as I will not dismiss yours.
Originally posted by Gooshin take a canon G9 and go photograph the rocky mountains in RAW in broad daylight
then do whatever you want with your Ziess lens, hell, mount it on a 5D for all i care.
on a computer screen, you wont be able to tell the different
on a 5X7 photo, you wont be able to tell the difference
on an 8X10, you MAAAYYYYY be able to tell the difference
only at about poster size will you be able to start telling a difference, and thats if you bring it up to your face. (or do 1X1 pixel peeping)
modern Point and Shoots suck ass when you want to do low light no flash, macro, or shallow DOF.
wide/normal angle shots done at hyperfocal distance produce almost indistinguishable results compared to SLR.
Again, I do my proof printing in A4, which is the first qulity check, second is A3.
but yeah for web the differences will be minor, but they are still there, I mentioned tonality, Dynamic range, colour reproduction and noice just above.
in broad daylight, it is almost given that in full daylight, any DSLR will retain better highlight and or shadow information than the G9, just hate to say it.
Again mounting it on a 5D or in my case D3, I will get a very different Field of view, than a G9 will ever come close to, and now you have upped the benchmark in terms of DR, tonality and colour reproduction and noice by quite a bit too.
Have you done a lot of large printing? I can most certainly discern between my DSLRs at A3 size, even A4 and that is at regular view distance... if you cannot good for you, you just saved yourself a lot of money.
Again that hyperfocal myth... hyper focal distance is based on a 10x15cm print size. I have absolutely no use for it when I know the output size is 40x60cm and again there is a difference between having objects in a landscape in critical focus or within acceptable focus.
The Zeiss 18/3.5 is aimed a quite a different market than the G9 or any other compact, it is a tool suitable for some, difinitely not for all.
It may be a worthless lens to you, but an invaluable tool to another.
Personally it will not make my shortlist, but I have other manual focus lenses that did and remain some of my favourites for landscape photography, among these the zeiss 28/2, which is very similar in FOV to what the zeiss 18/3.8 would be on APS-C.
I am not knocking the G9 or a compact for situations where they are useful, but for landscape work in particular, there is quite a difference, regardless of light, especially at poster print sizes, at least from what I have seen and experienced.