Search results for 'uv filter' - page 71
16-45 vs 24-90
Which lens exhibits vignetting. The 24-90 certainly shouldn't unless you have too small a hood on it. I've never noticed it with my 16-45 on my D either. Maybe your filter is causing it. You'll see other threads on here about opinions on filters. Personally, I can't see the point of buying a very ex...
Posted by Pwynnej on 16/11/2006 - 09:17
16-45 vs 24-90
I would try taking a few shots with the filter off and see if you get the same/different result. If the lenses image circle is a very close fit to your sensors dimensions or it is slightly off centre (unlikely), vignetting may occur. Q: Is the vignetting more or less uniform at each corner of th...
Posted by Mannesty on 16/11/2006 - 09:24
16-45 vs 24-90
I would prefer a filter on the front to protect the front element... I wouldn't be so sure of that :| I have both the 16-45 and the 24-90. Both had Hoya Pro-1 UV0 slimline filters to "protect" the lens. Managed to drop the 24-90 (*ist-D and lens slipped round my shoulder while kneeling dow...
Posted by MattMatic on 16/11/2006 - 09:26
Where to buy non-DA autofocus lenses (in the UK)?
Thanks for all the suggestions. To be honest I do prefer the A-series; they just have a much better feel to them and I like focusing manually. The problem is I sometimes find it hard to focus manually on the K100d; it's a tiny viewfinder and I wear glasses, and the diopter adjustment can only do so ...
Posted by ZaphodB on 22/11/2006 - 11:22
Wide angle
Whatever the Sigma is like optically, in terms of physical design I'd much prefer one of the Pentax DA lenses. Even on the cheap 18-55mm (the one I have), there's the quick-shift focus that lets you focus manually while in AF mode (works very well) and the little tab that can be removed from the len...
Posted by ZaphodB on 23/11/2006 - 22:54
pentax 16-45 vs. Sigma 17-70
did you try to shoot at the sun with the Sigma to test for flare resistance? Before I had my Pentax K100D I had a Canon 300D with a Sigma 17-70mm. The lens is very good indeed. I did not notice any problems with it. But the Sigma 17-70mm on my Pentax K100D is considerably sharper (because of the f...
Posted by Hythloday on 25/11/2006 - 10:26
pentax 16-45 vs. Sigma 17-70
The problem of flare is often worse when the sun is at an angle - when there's lots of light bouncing around between the elements. A straight-at-the-sun approach doesn't always tell you everything ;) It could be tricky, but I'd check out: * Resolution. Preferably edge-to-edge sharpness, so you'l...
Posted by MattMatic on 29/11/2006 - 14:11
Dismantling smc 70-210 lens.
Removing the front element is simple enough but if you don't use the correct tool you risk damaging it and the filter thread. Treat yourself to a lens spanner/wrench. Worth it's weight in gold. I've just rejuvenated a SMC-Pentax 400mm 1:5.6 lens by cleaning some fungus from the inside of the front e...
Posted by Mannesty on 26/11/2006 - 17:59
Mirror Lens for DL2
The Tamron SP 500 lens is a good performer, as is the Tokina. Other than the doughnut effect of out of focus highlights, another criticism that you will often hear regarding mirror, or reflex lenses, is that images tend to be a little softer than those from traditionally constructed lenses. One b...
Posted by Mannesty on 08/12/2006 - 22:36
K10D - DA lens advice?
I have no doubt that some Sigma, Tokina, Tamron or other independent lenses are very good indeed in terms of sharpness and/or resolution, Kevin. What I have found over many years is that it cannot be guaranteed, which can lead to expensive buying mistakes, and it's cheaper in the long run to bite...
Posted by johnriley on 07/12/2006 - 23:16
28mmf2.8 Pentax-M pics
[ ] [ ] Here's a couple of pics with the 28mm f2.8 Pentax-M lens.'Holy Light' was taken in Basildon Town Centre church; I went in to see and found this amazing light effect ( Lucky for once !). ME Super body, Fuji Superia 400 . [ ] [ ] Birling Gap, East Sussex. Seen so many pics of this pl...
Posted by Peter Elgar on 13/01/2007 - 10:59
15mm f 3.5 SMC Takumar example
[ ] [ ] Took this some years ago on the beach of Carmel, California, with a borrowed 15mm SMC f3.5 Takumar from the Pentax Club; Spotmatic body, Pan F film developed in Promicrol: the built-in Orange filter used.Scanned from a 10x8" print.
Posted by Peter Elgar on 10/02/2007 - 21:53
DA* Lens information for the first two but not the 60-250mm
Noooooooo :P + The PENTAX K10D firmware must be updated to take advantage of this automatic switching function. More goodies as well maybe then?? ;) And a 77mm filter on the 16-50 :shock: But why, oh why, would you want to wipe off "cosmetics" from the front element?? :P Matt
Posted by MattMatic on 22/02/2007 - 09:23
Various items for sale, mainly lenses.
As I mentioned a month or so ago, there has been a change in my circumstances which means, amongst other things, that I don't get out and about as much as I did. It seems a good time to actually do what I have been meaning to do for a long time, and that is to sell off all the gear that I don't u...
Posted by George Lazarette on 20/03/2007 - 23:55
12-24mm - Pentax vs Sigma
I'm after a little advice... I think I might be already answering my own line of thinking but a little input and experience from you fine chaps and chapesses won't go a miss. I already own a Sigma EX 12-24mm DG and in an effort to wean myself off carrying all the MF and Pano kit around I have bee...
Posted by spirit_of_will on 20/03/2007 - 23:19
12-24mm - Pentax vs Sigma
Hi Will, I've got the 10-20 Sigma, and I like it - usual good EX build quality. Recently posted about it here: www.pentaxuser.co.uk/forum/viewtopic.php?p=24768&highlight=#24768 You can use filters with it - I've used 'P' size polariser in the mount, which, rather than fitting to an ad...
Posted by spirit_of_will on 21/03/2007 - 07:53
Considering a 28-200
Whilst the lens is quite compact to start with, when zooming the lens almost doubles in length... For a lens having 7+ X zoom ratio, I'd say that for it to only double in length when zoomed between it's extremes, was actually pretty darned good. Measured from the front surface of the filter thread t...
Posted by Mannesty on 28/03/2007 - 18:05
K10 general purpose zoom choices.
Adding my bit about the 24-90... This is an expensive lens :D SRP was around £450. Echoing George's thoughts, as a single lens solution, it's wonderful - giving about 35-135mm angle of view. Lovely bokeh and very sharp. In fact, I used it recently for some head and shoulder portraiture I was doin...
Posted by MattMatic on 23/04/2007 - 17:38
Macro Lenses Advice Urgently Needed Please
Tamron AF 90mm f/2.8 SP LD Macro ordered it today It was ordered but Camera King and Warehouse Express don't have it in stock, well not for the Pentax anyway. It really makes me mad when they show it in stock on their websites and then say its not in stock. I have tried several others with the sa...
Posted by UPINSMOKE on 26/04/2007 - 20:20
Pentax 10-17 or Sigma 10-20
someone has just posted a photo on dpreview demonstrating the degree of vignetting on a Sigma 10-20 at 10mm - it's bad There are two things that make a super wide vignette with Cokin P filters... and this is what you do (in true Blue Peter style :P ): * We tried hacksawing off the front two slots...
Posted by MattMatic on 27/04/2007 - 09:11
