Search results for 'back focus' - page 1225
New Pentax HD PENTAX-D FA MACRO 100mm F2.8 ED AW announced.
Any idea when the FT eyecup for the K1 is coming back into stock Chris? In a word, no... I'll chase them up as they've been on order for a while. If you put your email address in the 'notify' box on the product listing, you'll get an email as soon as they arrive and we've booked them in.
Posted by Chris@SRSWATFORD on 20/10/2022 - 13:07
Help - how does the Semi-Automatic diaphragm on early Auto Takumars work?
I should know this (and maybe I do!) but I currently only have one Auto Takumar (the 35mm f2.3) and want to make sure the functions are as they should be. These "semi-automatic diaphragm" lenses have a cocking mechanism on the lens which consists of a protruding finger/thumb knob that you press d...
Posted by LennyBloke on 28/10/2022 - 17:25
An autofocus Trioplan 180mm
I have been remounting old lenses to M42 screw mount for a while and, by necessity, they must be used in manual or AV mode. Each lens usually needs some additional extension tubes between the mount and the camera body to account for its particular focal length. I have known for a long time that in...
Posted by davidwozhere on 22/11/2022 - 01:20
My 60-250 Journey.
Thanx everyone. Now am I right in thinking the SDM motor is good as it works perfectly in live view? It's only through the viewfinder that the lens won't focus. Anyone know how long jps guarantee their repairs for?
Posted by bettyswolloks on 27/12/2022 - 11:12
My 60-250 Journey.
Not sure on either of the questions I am afraid. I also think the screwdrive conversion does not work with the 60-250, which is a shame. What do you intend to use the lens for ? Even when working normally the SDM AF is not very quick, and probably unsuitable for sports action or moving wildlif...
Posted by pschlute on 27/12/2022 - 12:24
My 60-250 Journey.
Intended use is hard to say really, a walkabout lens for any and everything I suppose. AF speed doesn't really bother Me if I'm honest, as long as it works I can work round it's limitations. Screw drive conversion is not possible on this lens, just My luck as it worked perfect on the film bodies. ...
Posted by bettyswolloks on 27/12/2022 - 14:23
My 60-250 Journey.
I've had the 16-50, 50-135 and 60-250 for quite a while (over ten years), and the only one I've had SDM failure is the 50-135, twice. The 60-250 and 16-50 have both been reliable. As for wildlife, I've used the 60-250 extensively before getting the 150-450, and, prefocusing to about the distance y...
Posted by pentaxian450 on 27/12/2022 - 15:52
My 60-250 Journey.
I love my 60-250mm. I bought from Johnsons (I think it was) a replacement rear baffle which I took a file to and removed the lip. Once it has been filed away and the shiny metal dulled down with a matte black sharpie I swapped them over. You can if you want just remove the rear baffle and use it 'mi...
Posted by cardiffgareth on 27/12/2022 - 17:31
My 60-250 Journey.
What the seller meant by not working was...... He had pulled it out if his wardrobe about 18mths after putting it there, it wouldn't focus. He put it straight back and pulled out his 2nd copy and went about his day. After a good few years and a complete system change he found the lens again. As h...
Posted by bettyswolloks on 27/12/2022 - 17:31
My 60-250 Journey.
What the seller meant by not working was...... He had pulled it out if his wardrobe about 18mths after putting it there, it wouldn't focus. He put it straight back and pulled out his 2nd copy and went about his day. After a good few years and a complete system change he found the lens again. As h...
Posted by Jonathan-Mac on 28/12/2022 - 09:38
My 60-250 Journey.
Hiya Mike, I don't have that kind of money kicking about spare at this moment in time. The cheapest 60-250 on ebay at the moment is £649 and that has bits missing and no box or papers. There are some cheaper but they have faults mentioned plus they would be subject to import duty. So for a freshly...
Posted by Mike-P on 28/12/2022 - 16:32
Auto focus with m42 lenses and an F series 1.7x AF adapter.
Here is an M42 mount Vivitar 170mm auto focus lens on a K1. It works perfectly. The SMC Pentax-F 1.7X AF adapter gets mixed reviews. The general tenor being that it is useful but of limited application. They can also be very expensive. If you want to extend its usefulness you can convert ma...
Posted by davidwozhere on 18/03/2023 - 23:40
Auto focus with m42 lenses and an F series 1.7x AF adapter.
Thank you for the tutorial. I wonder whether copper tape may be used to provide the same benefit without permanent modification to the lenses. I'll try it out if I get the time.
Posted by HarisF1 on 19/03/2023 - 01:14
Auto focus with m42 lenses and an F series 1.7x AF adapter.
If you know of a printer in your area doing "diecutting", they use very thin and narrow metallic tape for the "make ready" of the form they're working on. This tape is outstandingly sticky, and conduct electricity with very low resistance. You could ask them for a few centimeters...
Posted by pentaxian450 on 19/03/2023 - 20:36
Auto focus with m42 lenses and an F series 1.7x AF adapter.
That's a good idea. Never knew it existed! ...... just ordered some off EBay. It's being marketed as "copper slug tape" because it's good at repelling slugs and snails !
Posted by davidwozhere on 19/03/2023 - 23:51
Auto focus with m42 lenses and an F series 1.7x AF adapter.
Not all M42s are amenable to this treatment - you need one with a flat metal rear flange. You also need to focus with the iris wide open and hold the half press while you stop down to your taking aperture. If you let the shutter button go and then stop down it will try to re-focus when you press the...
Posted by geordie01 on 21/03/2023 - 11:44
Irix 150mm macro and 1.7x AF adapter.
A thread in the classifieds notes that the Pentax 1.7x AF adapter won't mount on the Irix 150mm macro (this is the reason why the adapter is for sale). I had found the same thing but couldn't remember why. I've now checked the lens and adapter, so here is the reason why the adapter won't attach to...
Posted by Lubbyman on 30/03/2023 - 20:17
The Value of Pye
8)The value of Pye to just one decimal place is around 4.5 months. The story begins with an SMC Pentax-FA 43mm f/1.9 Limted lens that had started to let me down in terms of AF. It just wasn't doing it, not every time but too often. Then the manual focusing jammed as well, so it was on the telepho...
Posted by johnriley on 30/03/2023 - 23:07
The Value of Pye
Yes it did, and once there things progressed quite reasonably. The work as I mentioned was exemplary and the lens looks like new. If it proves anything, it's that just travelling with one camera body and/or one lens has a risk element, as cameras and lenses do fail. In all the years I have used ...
Posted by johnriley on 31/03/2023 - 12:49
The Value of Pye
I've just had a similar issue with a lens that I accidentally damaged. I knocked the lens such that the mount on the lens became loose. I carried on using the lens for several weeks making sure that both the lens and camera were supported at all times. The photos I took were fine but i decided that ...
Posted by AlB on 05/04/2023 - 18:38
