Search results for 'back focus' - page 656
Is a Really Fast Lens Worth It?
".......... the slower lens is often easier to focus, because the image snaps in and out of focus far more noticeably with the slower lens..." I think you have this round the wrong way,...a faster,ie, larger aperture gives less depth of field and thus allows easier image 'snap' than a s...
Posted by viewfinder on 04/11/2006 - 10:28
Is a Really Fast Lens Worth It?
It is generally accepted that a brighter viewfinder image is easier to focus, but it's not always the case. Some users report difficulty when using the Beattie type screens which, although undeniably brighter, seem to make the point of focus less easy to judge. This may mean that the granularity of ...
Posted by johnriley on 04/11/2006 - 11:18
Is a Really Fast Lens Worth It?
Hiya, To reply to this: "I think you have this round the wrong way,...a faster,ie, larger aperture gives less depth of field and thus allows easier image 'snap' than a smaller aperture....." I do realise what I said and I stick by it. It is a misnomer that fast lenses with shallow...
Posted by bretbysteve on 04/11/2006 - 14:37
Is a Really Fast Lens Worth It?
I think the key point here is the amount of light available. In normal daylight it's easy enough to focus any lens, but in twilight a wide max aperture makes things much easier. G
Posted by George Lazarette on 04/11/2006 - 14:54
Is a Really Fast Lens Worth It?
Talking of focusing lenses, it's also vital that the eyepiece correction is suitable for your eyesight. As photographers get older it's more and more difficult to focus using the standard eyepiece with a -1 dioptre value such as found on most earlier Pentax cameras. Some photographers might find ...
Posted by johnriley on 04/11/2006 - 15:00
Is a Really Fast Lens Worth It?
Sometimes a shallow DOF actually makes the focus point more critical and you end up going back and forth to find it. Okay, fair point, probably found by myself with my test - but are you not getting acceptable focus with the increased depth of field of a slower lens, rather than critically sharp foc...
Posted by Daniel Bridge on 05/11/2006 - 23:20
Is a Really Fast Lens Worth It?
I'm with Daniel on this one. :-) He's quite right. The greater DOF of a small ap. lens allows for a wider range of "acceptable" focus. It doesn't help to obtain true focus. G
Posted by George Lazarette on 05/11/2006 - 23:27
Is a Really Fast Lens Worth It?
Hi Daniel & George.. ...oh dear, I agree with you both, of course you are correct... "He's quite right. The greater DOF of a small ap. lens allows for a wider range of "acceptable" focus. It doesn't help to obtain true focus" ..but, we are not disagreeing here, you a...
Posted by bretbysteve on 06/11/2006 - 15:15
Is a Really Fast Lens Worth It?
lens quality has a lot to do with focusing ease as well. I used to have a Sirius coke bottle of an 18-28. I think it was something like F3.5-4.5, making it roughly the same speed as the 18-55 kit lens which came with my *ist. Compare the ease of focusing however........ the Sirius rendered a v...
Posted by Mongoose on 28/11/2006 - 18:07
Is a Really Fast Lens Worth It?
This has certainly been an interesting discussion but as always, there are so many variables to consider. I don't own a 'really' fast lens but I love the bright viewfinder image that I get with my A50mm 1.4 and find it very easy to focus and my Tamron 135mm F2.5 is also excellent in this regard. D...
Posted by Kimbo on 29/11/2006 - 15:55
I have a gap to fill...
LOL! It's Chris back with tempting offers that drain the credit card again :P
Posted by MattMatic on 15/11/2006 - 14:48
I have a gap to fill...
Unfortunately, working for a Japanese company and sitting opposite a Japanese colleague who'd be happy to buy the lens for me in Tokyo, doesn't bode well (Japanese price is a shade under 500 pounds plus bottle of whiskey)....but I have other things on my list.. Chris - I will come and talk to you...
Posted by Pwynnej on 16/11/2006 - 16:38
77mm Limited info
Sorry - I wish... have only ever seen 1 of the black 31mm's and I own it 8) I asked the shop in Japan for weeks and weeks if they could get hold of more and no joy! I had a look around on the B&H website yesterday and they have both silver and black 31mm's in stock at around the $870 mark - n...
Posted by spirit_of_will on 10/11/2006 - 09:47
Searching for a FA 28mm
Many congratulations! My wife gave birth to a baby girl 3 months ago and she is a joy to us both. 95% of the photos I have taken of my daughter so far have been with the 50 mm f1.4 and I am tremendously pleased with the results, especially indoor shots at wide aperture - super sharp eyes and ver...
Posted by Juno 60 on 15/11/2006 - 13:01
Searching for a FA 28mm
Yup, I'd say one of the SMC 50mm/f1.4 for sure ;) (FA, F, A) Low light, indoors, outdoors, portraits etc - a real gem of a lens. Absolutely lovely! Much more available than the 31mm. Also has the advantage if you shoot at f2 to f2.4 and focus carefully on the eyes that everything goes lovely and...
Posted by MattMatic on 15/11/2006 - 13:56
50mm opinions
The A50/1.4 is one of the best Pentax lenses I've ever used, so I know which I'd choose :-) At one time or another I've had all the manual focus 50's (but don't tell the wife!). The only pentax 50 I prefer to the A50/1.4 is the K55/1.8, but not being an A lens it is somewhat harder to use on a di...
Posted by Reuben0 on 11/11/2006 - 18:41
50mm opinions
Thanks for your input gentlemen. Well, it seems like many would prefer the 1.4 so I guess my first thought stays put. And Reuben; Oh, yes, the K 55/1.8 that came with my KM when I bought it new way back in the -70's was THE lens in my outfit then. Later on, when my sallory accepted it, I extended...
Posted by matsoberg on 12/11/2006 - 13:34
Cheap Sigma 105mm macro
Hi Chukka I have the Sigma 105 EX in the non-DG version, originally bought for use on my MZ-5n and then MZ-S... I don't have any experience with the DG version but have had no problems what-so-ever using the sigma on my ist-D. I've used both this and a Pentax 100mm A series manual focus macro len...
Posted by spirit_of_will on 12/11/2006 - 22:50
Cheap Sigma 105mm macro
Thanks Dan, I had exactly the same problem. Once I opened it in a new window and went back to the thread it was there. Seems like fotocommunity.de is protecting the pic somehow. Will try to link it differently... Prieni New try (not sure that link stays permanent; wonderful ways of Google.....
Posted by Prieni on 16/11/2006 - 18:21
Cheap Sigma 105mm macro
Thanks for hanging in there. I guess both servers are not ideal for that sort of linking. The second one is Picasaweb from Google and I'm not sure that this link is stable. When I posted the first version (from fotocommunity) the pic would disapear when refreshing the thread page. Had to open it in...
Posted by Prieni on 16/11/2006 - 18:39
