Search results for 'back focus' - page 1209
Irix 150mm Macro
The focussing was a surprise to me when I got home and saw them on a big screen. Particularly as I wear varifocals that were tending to mist up when looking through the viewfinder. I don't think I could have done it with any of my AF lenses, the focus rings rotate too easily. But of course, that mig...
Posted by Lubbyman on 20/02/2019 - 12:01
Irix 150mm Macro
This one for Barry E. Here are a few non-macro pictures, focus ranging from about 20 yards to about 3/4 mile. Done while walking the dog, K3 held by one hand, other hand holding dog on lead and focussing with a couple of fingers, so challenging to say the least! SR on. Aperture and ISO chosen to giv...
Posted by BarryE on 20/02/2019 - 16:42
Irix 150mm Macro
Another one for BarryE (and a bit heavy on pictures). Here's what it's like for shooting into bright light. Can't get much brighter than the sun. No subtlety here, just focus and shoot in Av with the sun in different places in the frame. Lens hood on for all. Same processing as before. It was hard t...
Posted by Lubbyman on 20/02/2019 - 22:00
Irix 150mm Macro
wait for hours at the same spot if I think the light might fall right - no dog would put up with that kind of abuse ! Just had a wicked thought. The dog is always on a lead because she would head off and not come back for ages (from bitter experience...). Now, if she could be trained to come back w...
Posted by Lubbyman on 21/02/2019 - 10:32
DA 17 - 70mm focus issues
I've had a DA 17 -70mm on my k-5 II for a few years now and it takes excellent photos. However, about three years ago it developed a problem where it wouldn't focus when it was zoomed in from about 45mm to 70mm. As soon as you zoom back out the AF works, but by this time you had generally missed t...
Posted by Mike-h on 04/03/2019 - 21:38
DA 17 - 70mm focus issues
It's actually quite a common problem with the DA 17-70mm, I believe it's something to do with the SDM. As far as I am aware there isn't a simple solution ... it needs repairing.
Posted by Mike-P on 04/03/2019 - 22:00
DA 17 - 70mm focus issues
This issue is common on the DA 17-70, they have inherent design faults which cause the symptoms you are describing. It's not a question of whether you will have focus issues with this lens, it's a question of when. The DA 17-70 is a very good lens when working correctly, but it's too prone to fa...
Posted by davidstorm on 04/03/2019 - 22:00
DA 17 - 70mm focus issues
I was about to buy one when my 16-50 first failed, it was in Jessops (Mk1) in Richmond. Before passing the money I asked to check it on a camera and it failed to work.... what blights the lens even further that it's SDM only, no option for screw drive...
Posted by ilovesaabs on 05/03/2019 - 14:31
Fishy Q Question
Has any Q enthusiast calibrated the focus scale on the Q 03 fisheye lens? The marks on the lens are no use without focus distances. A first play with it today convinced me that focussing does matter, and checking focus on the screen isn't always possible. Steve
Posted by Lubbyman on 29/03/2019 - 19:53
Fishy Q Question
The focusing points are completely useless. One quarter of the whole scale goes from near to infinity focus, then the rest goes beyond infinity. I don't think there's a way to calibrate.
Posted by HarisF1 on 29/03/2019 - 21:26
Fishy Q Question
The focusing points are completely useless. One quarter of the whole scale goes from near to infinity focus, then the rest goes beyond infinity. Thanks. That explains why focus seemed quite random this afternoon. I'm not usually so bad at manual focus. So is focussing a matter of either using the...
Posted by Lubbyman on 29/03/2019 - 21:55
Fishy Q Question
I'd experiment on getting infinity focus using the image zoom (I think it works) and then just use a bit of tape to hold the focus ring in that spot. The depth of field is extremely large so you rarely need to adjust focus.
Posted by HarisF1 on 30/03/2019 - 00:14
Fishy Q Question
I'd experiment on getting infinity focus using the image zoom (I think it works) and then just use a bit of tape to hold the focus ring in that spot. Thanks, good suggestion. :D How did the world survive before sticky tape was invented?? The depth of field is extremely large so you rarely need ...
Posted by Lubbyman on 30/03/2019 - 11:16
Fishy Q Question
An update on the Q 03 focus scale, it might be useful for anyone struggling to focus this l;ens. Someone has calibrated the focus scale and posted the results in a user review of the lens in Pentaxforums (am I allowed to say that name here??). In essence, when you look at the scale from behind th...
Posted by Lubbyman on 14/05/2019 - 23:27
Sigma 24-70mm
I had the EX DF 28-70mm f/2.8 for a while and was not at all impressed. Huge and very heavy it was de-centred and produced poor images. After a short time it spontaneously (no knocks, no drops, just sitting in the cupboard) developed very stiff focusing under 3m, too stiff for any focus motor to s...
Posted by Jonathan-Mac on 08/04/2019 - 08:56
Another Pentax Soft lens
Pschlute reminded us of the long gone heritage of Pentax soft focus lenses with his beautiful pet portrait - they produced 3 85mm versions (K f2.2, F f2.8 and FA f2.8) and a 28mm (FA 2.8). The F and FA 85's are essentially the same lens (optically), while the K has a completely different optical des...
Posted by LennyBloke on 27/04/2019 - 11:58
Do I need an adaptor for Pentax Fit Tamron 200mm F3.5 lens to K 3 ii ?
That lens seems to get good reviews. Personally I would go for a Pentax lens to avoid the adapter malarkey. If you want a cheap manual focus/exposure lens the M series 200mm f4 is a good option https://www.ebay.co.uk/itm/Pentax-M-series-200mm-F4-prime-telephoto-lens-Crystal-clear-glass/173884090...
Posted by pschlute on 28/04/2019 - 14:35
Do I need an adaptor for Pentax Fit Tamron 200mm F3.5 lens to K 3 ii ?
That lens seems to get good reviews. Personally I would go for a Pentax lens to avoid the adapter malarkey. If you want a cheap manual focus/exposure lens the M series 200mm f4 is a good option https://www.ebay.co.uk/itm/Pentax-M-series-200mm-F4-prime-telephoto-lens-Crystal-clear-glass/173884090...
Posted by Chrism8 on 28/04/2019 - 15:57
smc PENTAX-DA 14mmF2.8ED[IF] ??
I saw it in the box in a display cabinet where it said on the box it was a DA* , but your right, on USA and EU sites it shows it as a DA (as do reviews). Maybe it is a Japanese version but if I go back to Kobe this week I will get it in my hands. By the way everything is more expensive in Ja...
Posted by Daronl on 09/05/2019 - 03:14
pentax k lens to nikon
Different flange focal distance than Pentax.... so it won't fit. A glass element could be incorporated, but would ruin the image quality plus Nikons can't extract all the magic image properties the way Pentax can. So buy Pentax every time :lol: -- Algi is quite right about PK having a shorter fla...
Posted by petrochemist on 12/06/2019 - 23:33
