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Photo Forum / Digital Photography / ZLR Cameras / April 2005Canon PowerShot S2 IS announced
Canon PowerShot S2 IS announced, please see: http://www.dpreview.com/news/0504/05042201canons2is.asp > Canon PowerShot S2 IS announced, please see: > > http://www.dpreview.com/news/0504/05042201canons2is.asp Sounds like a worthy upgrade to the S1; the jump from 3 MP to 5 MP is a good one. Pity that the S2 IS has switched to using SD memory cards instead of sticking with Compact Flash. Hopefully the strong chromatic aberrations of the S1 have been largely tamed, making it a closer competitor to the Panasonic FZ20 in the image quality department. The old S1 IS and the new S2 IS cameras even got more than a passing mention at www.robgalbraith.com, which was a pleasant surprise. It will be interesting to see what shape a Canon Pro 1 update will take, whether or not it will include IS and a proper f/2.8 lens to get it somewhere near competitive in features with the FZ20. -- Witold.  SignatureCheers _ Hunibal _ > >> Canon PowerShot S2 IS announced, please see: [quoted text clipped - 5 lines] > instead > of sticking with Compact Flash. Is the SD memory card - not as good as - Compact Flash? Cheers _ Hunibal _ [] > Is the SD memory card - not as good as - Compact Flash? Possibly better - there are fewer contacts and no very small connector pins to break off. Speed and cost are about the same. Just a little smaller and easier to lose! I've been using KingMax Platinum and SanDisk Ultra II. Cheers, David "Hunibal" <hunibal_@hotmail.com> wrote in news:JVBae.11700$9G.943920 @news20.bellglobal.com: >>> Canon PowerShot S2 IS announced, please see: >>> [quoted text clipped - 5 lines] > > Is the SD memory card - not as good as - Compact Flash? Not as far as I know. As I have got a compact flash card, the use of SD cards just means that I can't use the CF card in an S2 IS. -- Witold. > "Hunibal" <hunibal_@hotmail.com> wrote in news:JVBae.11700$9G.943920 > @news20.bellglobal.com: [] >> Is the SD memory card - not as good as - Compact Flash? > > Not as far as I know. As I have got a compact flash card, the use of > SD cards just means that I can't use the CF card in an S2 IS. Yes, that's why I said it's a pity as CF cards from an S1 can't be used in the S2. However, with the cost of cards as it is, perhaps buying some more amy not be sucha bad idea. After all, you can then use them in the Nikon D50 should you want to go the DSLR route! <G> David > Canon PowerShot S2 IS announced, please see: > > http://www.dpreview.com/news/0504/05042201canons2is.asp Interestingly long zoom range but I remember with great affection real wide angle lenses (24-28mm) and I wonder what are the practical difficulties in producing a real wide angle in cameras such as this? IMHO, 36mm equivalent is not a wide angle! SignatureJames V. Silverton Potomac, Maryland, USA >> Canon PowerShot S2 IS announced, please see: >> [quoted text clipped - 4 lines] > the practical difficulties in producing a real wide angle in > cameras such as this? IMHO, 36mm equivalent is not a wide angle! A 24mm - 288mm (the same 12X zoom ratio) would be great, wouldn't it? Cheers, David In article <TbIae.18495$G8.12416@text.news.blueyonder.co.uk>, "David J Taylor" <david-taylor@blueyonder.co.not-this-bit.nor-this-part.uk> wrote: > >> Canon PowerShot S2 IS announced, please see: > >> [quoted text clipped - 9 lines] > Cheers, > David The problem isn't necessarily the 12x zoom, it's the shortest focal length. At the shortest focal length the lens has its widest angular field of view, and as that parameter goes up, the optical designer's challenges increase at a rapid rate. The lens must always produce a flat focal plane, be achromatic and sharp to the edges (you hope), and have minimal distortion. As the angular field of view increases, satisfying all four of these requirements becomes much harder, especially if you want a reasonably fast lens. It wouldn't be too hard at f/8 or so, but who wants that for their maximum speed. Trying to put a truly wide angle focal length at the end of a 12X zoom on a fast lens must be either extraordinarily difficult (and expensive) or impossible with today's glasses if you want good performance. Fixed focal length wide angle lenses themselves aren't so cheap if they are good. One of my colleagues designs state-of-the-art lenses for his research. I'll run this by him for a more definitive answer. Joe > In article <TbIae.18495$G8.12416@text.news.blueyonder.co.uk>, > "David J Taylor" [] >> A 24mm - 288mm (the same 12X zoom ratio) would be great, wouldn't it? >> [quoted text clipped - 3 lines] > The problem isn't necessarily the 12x zoom, it's the shortest focal > length. [] > One of my colleagues designs state-of-the-art lenses for his research. > I'll run this by him for a more definitive answer. > > Joe Oh, I do appreciate the design difficulties - I was thinking how operationally useful a 24 - 288mm lens would be! You need to aim for f/2.8 or better to provide some depth-of-field limitation, and for reasons of diffraction f/8 is like to be the smallest aperture you would want. I'll be interested to hear what your colleague says. Cheers, David "David J Taylor" <david-taylor@blueyonder.co.not-this-bit.nor-this-part.uk> wrote in message news:dd0ce.21057$G8.17688@text.news.blueyonder.co.uk... >> In article <TbIae.18495$G8.12416@text.news.blueyonder.co.uk>, >> "David J Taylor" [quoted text clipped - 21 lines] > the smallest aperture you would want. I'll be interested to > hear what your colleague says. I appreciate and I now have a better idea of the difficulties in designing a wide angle zoom. Just to add a personal note, I'd much rather have a 28mm (or better 24) equivalent than even a 200mm. SignatureJames V. Silverton Potomac, Maryland, USA [] > I appreciate and I now have a better idea of the difficulties in > designing a wide angle zoom. Just to add a personal note, I'd > much rather have a 28mm (or better 24) equivalent than even a > 200mm. I've ended up with 24 - 432mm :-) but in two cameras :-( David > > Canon PowerShot S2 IS announced, please see: > > [quoted text clipped - 4 lines] > the practical difficulties in producing a real wide angle in > cameras such as this? IMHO, 36mm equivalent is not a wide angle! I've got the Panasonic FZ20 and with a suitable WA converter on the front it gets acceptable wide angle shots. Here are three shots taken with a WA TC = 28mm equivelent- http://ken.smugmug.com/gallery/431818 |
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