All Forum Comments
Comment by Benz3ne posted on K-1 ‘breathing’ query. at 04/03/2020 - 18:20
bforbes wrote:
Has anyone said where it should blow from? Looking at the change in size of the 150-450 it needs to move around 300cc of air between the 150 and 450 ends
Not really, but again no one aside from myself has reported the rear dial being an exit/entry point for air. It's quite notable too, there's a definite 'whoosh' of air in and out. I say notable as I can feel it on my face with the camera to my eye, and Mabel (doggo) was doing some tilty head at it yesterday when I was taking some practice shots of her from about a m or so away.Has anyone said where it should blow from? Looking at the change in size of the 150-450 it needs to move around 300cc of air between the 150 and 450 ends
I'm not denying the air has to go somewhere, I'm just surprised at how easily it sucks/blows through that rear dial.
Comment by Benz3ne posted on K-1 ‘breathing’ query. at 03/03/2020 - 16:28
HarisF1 wrote:
That's actually a very good resolution, worthwhile if it sorts out the issue. Might have been worth sending the lens with it to ensure they replicate the issue. But that might be a bit of a risk considering it's brand new.
I would have thought they have demo Pentax lenses considering they stock Pentax stuffs anyway, so hopefully they can chuck one on the front and replicate it. I wouldn't have thought it was specific to my lens and camera. I've let them know that it does only appear to be present with the WR zoom as I'd never noticed it on my A 70-210mm f/4. Hopefully it'll mean a camera that doesn't blow in my face (steady on!) when I use it in 3-4 weeks time!That's actually a very good resolution, worthwhile if it sorts out the issue. Might have been worth sending the lens with it to ensure they replicate the issue. But that might be a bit of a risk considering it's brand new.
Unfortunately that means a likelihood of no DSLR when I visit Tenby towards the end of the month but I'll take a film camera anyway for funsies.
Comment by Benz3ne posted on K-1 ‘breathing’ query. at 03/03/2020 - 15:22
I've spoken to the supplier this morning and they've agreed with my concerns surrounding dust and water ingress considering it is a weather-sealed camera. They've offered me a postage label to return for inspection and if they find the fault (or at least agree that it's a fault upon inspection) it'll be sent for repair. 3-4 weeks typically for repair so potentially a while without the camera, but I'd suggest a worthwhile repair considering I live in rainy ol' Wales! I'd rather the peace of mind than a camera that's potentially accumulating dust where it shouldn't be!
Comment by Benz3ne posted on K-1 ‘breathing’ query. at 03/03/2020 - 12:50
A Tenpa 1.22x magnifying eyepiece. Contrary to the ~£100 they seem to fetch here in the UK, I purchased this lightly used one for around £40. Thereafter I can decide whether I'll keep this or the O-ME53. Given the reports of quality, I'm guessing the Tenpa will stay.
Comment by Benz3ne posted on What's your latest acquisition? at 03/03/2020 - 09:42
HarisF1 wrote:
I have to jump on the K55 bandwagon too. It's essentially the same lens as the Takumar 55/2 that I had. There was a point where I thought it was actually better than the DA50!
From the old Taks you could also add the 135/3.5 as an example of a weird but wonderful lens. It's built beautifully and has top quality rendering to boot.
I have to jump on the K55 bandwagon too. It's essentially the same lens as the Takumar 55/2 that I had. There was a point where I thought it was actually better than the DA50!
From the old Taks you could also add the 135/3.5 as an example of a weird but wonderful lens. It's built beautifully and has top quality rendering to boot.
That makes three of us. I’ve been tempted to grab a Tak 135/3.5. I’ve heard on numerous occasions that it’s a step up from the M135/3.5 I currently own.
Comment by Benz3ne posted on Pentax lenses are weird but wonderful at 02/03/2020 - 17:31
After owning the K-1 almost a couple of months, and the D-FA 28-105 for a short while, I’ve gotten around to putting the latter on the former. I’m aware both are WR, so wondered if this was normal or typical.
When zooming from wide to zoom, the K-1 breathes in. When zooming from zoom to wide, the K-1 breathes out, through the rear dial and towards my face. I assumed that, given it WR, it should be sealed to some degree. What that degree is, however, I’m not sure.
Anyone else seen this or is it a quirk of a slightly older camera who’s seals aren’t what they used to be?
When zooming from wide to zoom, the K-1 breathes in. When zooming from zoom to wide, the K-1 breathes out, through the rear dial and towards my face. I assumed that, given it WR, it should be sealed to some degree. What that degree is, however, I’m not sure.
Anyone else seen this or is it a quirk of a slightly older camera who’s seals aren’t what they used to be?
Comment by Benz3ne posted on K-1 ‘breathing’ query. at 01/03/2020 - 13:43
HarisF1 wrote:
Great bokeh with a distinct shape!
A certain 100mm is the only one I know that does this, there may be others too.
The effect is very very strong here, the 1st and 3rd images are a bit overpowering. The second image uses the effect subtly to get a very pleasing result.
Thank you for these intriguing threads John!
I’m not sure if something like the Fujinon 55/2.2 also does this as well as the Pentax K 55/1.8 but not as pronouncedly ‘soapy’. Great bokeh with a distinct shape!
A certain 100mm is the only one I know that does this, there may be others too.
The effect is very very strong here, the 1st and 3rd images are a bit overpowering. The second image uses the effect subtly to get a very pleasing result.
Thank you for these intriguing threads John!
Lovely pics all the same. You keep tempting me to buy more lenses...
Comment by Benz3ne posted on Another guess the lens.... at 01/03/2020 - 11:43
Jonathan-Mac wrote:
Personally, I think that designing a lens for extremely high levels of sharpness tends to eliminate character, good rendering and that 3D/pixie-dust look. Striking a balance between those two things is an art that I think has declined and at which I suspect Pentax has been better at than most, though even they have caved to the market and seem to value sharpness over all other aspects of lens design (rendering, size, weight, cost etc etc).
Of the lenses I've used, the two that immediately come to mind as being extremely sharp while retaining fantastic rendering are the DA 35mm Limited and the Fujifilm 35mm f/1.4. Some others to a lesser degree - the Sigma and Tamron 17-50/2.8s, the DA 70mm Limited, the Auto Revuenon 50/1.4, the old Minolta 50/1.7 (though there are several versions and I don't know if all have the same formula as mine). I'm sure there are others.
I’d add the Flektogon 35/2.4 into the sharpness/rendering mix too.Personally, I think that designing a lens for extremely high levels of sharpness tends to eliminate character, good rendering and that 3D/pixie-dust look. Striking a balance between those two things is an art that I think has declined and at which I suspect Pentax has been better at than most, though even they have caved to the market and seem to value sharpness over all other aspects of lens design (rendering, size, weight, cost etc etc).
Of the lenses I've used, the two that immediately come to mind as being extremely sharp while retaining fantastic rendering are the DA 35mm Limited and the Fujifilm 35mm f/1.4. Some others to a lesser degree - the Sigma and Tamron 17-50/2.8s, the DA 70mm Limited, the Auto Revuenon 50/1.4, the old Minolta 50/1.7 (though there are several versions and I don't know if all have the same formula as mine). I'm sure there are others.
Comment by Benz3ne posted on Pentax lenses are weird but wonderful at 01/03/2020 - 11:41
johnriley wrote:
The lenses have a certain indefinable quality about them, but don't necessarily have the highest resolution of all available lenses. The FA-J 75-300mm is a good example - not the sharpest of lenses, but sharp enough and having the most glorious bokeh. I picked up a new one from SRS when they were clearing the last few and use it extensively on the K-1 for flower studies and wildlife. At £100 it was a fantastic bargain.
I’ve been deliberating between a cheaper x-300mm ish lens for a bit of reach on the K1. Toss up is between this, the Sigma 70-300 APO and the FA 80-320mm... decisions! The lenses have a certain indefinable quality about them, but don't necessarily have the highest resolution of all available lenses. The FA-J 75-300mm is a good example - not the sharpest of lenses, but sharp enough and having the most glorious bokeh. I picked up a new one from SRS when they were clearing the last few and use it extensively on the K-1 for flower studies and wildlife. At £100 it was a fantastic bargain.
Or I save up and buy a PLM like the one I recently sold, ha.
Comment by Benz3ne posted on Pentax lenses are weird but wonderful at 29/02/2020 - 21:13
This is normal. On Nikons the air comes out of the eyepiece. I image Pentax designers have also developed an engineering solution to this problem
"Eyeblow
As the 24-70 2.8 is zoomed in and out, some air pumps in and out, and you may have some air blow out of the eyepiece into your eye.
I couldn't feel anything at a camera's viewfinder, even though some air does pump in and out of the back of the lens."
https://www.kenrockwell.com/nikon/24-70mm.htm