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Forum: Pentax K-1 03-07-2019, 09:42 AM  
No Spin wanted , rotating front elements!
Posted By blackest
Replies: 6
Views: 561
Thanks john,

it seems like its a problem with film era Pentax Zoom Lenses having a rotating front element, which is a pity.

there is the tamron 28-200 which seems to be soft with cr and purple fringing, will find out next week, when it arrives
Forum: Pentax K-1 03-06-2019, 01:28 AM  
No Spin wanted , rotating front elements!
Posted By blackest
Replies: 6
Views: 561
I couldn't find it , there are lens which say internal focusing, but not specifically if the filter ring rotates. I'm playing around with an anamorphic lens so orientation matters as well as cpl and gnd filters. The results with the anamorphic have been surprising. For 50mm it pretty much works wider is useless, lot of light loss (1/160th f2.8 iso 1600 in daylight!
Forum: Pentax K-1 03-05-2019, 10:58 PM  
No Spin wanted , rotating front elements!
Posted By blackest
Replies: 6
Views: 561
Hi all,
I'm looking for lenses that don't rotate the front element to focus.

Most primes do not rotate, pk and pka lenses mostly don't , most af zooms do :(

Good in terms of the front element not rotating for focus:

Pentax F 1.7 50mm doesnt

bad front element rotates:

PentaxF 70-210 does
Sigma 70-300 does


I'm not looking for IQ that can be searched for i just want to find which lenses do not rotate the front element and preferably auto focus
Forum: Pentax K-1 03-01-2019, 03:17 AM  
K1 how much of the sensor is used in video mode?
Posted By blackest
Replies: 11
Views: 716
The strange bokeh and odd flare , even the distortion are all part of what makes anamorphic lenses special. They really are a story telling lens.
Some of the best stories you have seen were filmed using an anamorphic lens
















You Tube




:)

I just tried movie mode on the K1 you can set an aps-c crop for video recording, so recording isn't forced to be over the full frame.
Forum: Pentax K-1 02-28-2019, 02:55 PM  
K1 how much of the sensor is used in video mode?
Posted By blackest
Replies: 11
Views: 716
Yes I have an app filmic pro (and filmic remote) it handles the desqueeze on the iphone.
I've been lusting after an anamorphic lens for a long time.

For full size cameras the price is just ,, too high. I love the cinematic look and probably will only get it on the iphone.

I just got a Zhiyon Smooth 4 today :)

This is going to be fun.
Forum: Pentax K-1 02-28-2019, 01:41 PM  
K1 how much of the sensor is used in video mode?
Posted By blackest
Replies: 11
Views: 716
It may not work on the K1 at all, i was surprised that the GH5 works as its a much bigger sensor than the iphone.

There is actually 2 versions of the 37mm mount moondog lens one is the 5141 (gen1) and the other is the 5241 (gen 2) They increased the aperture size on the gen2. I've just corrected my order to the gen2. The video in the thread was shot with the gen 1 lens.

I think with my Panasonic it uses a narrower field of view when shooting video. I don't know if the k1 or k5 do similar or if the vignette will be too much. I should have it in a week or 2 and see if it will be any use on larger sensors.

Kind of a shame the 2 pentax cameras don't do 4k video as i'd have more to crop.

Anyway it's coming now so , we will see. Birders often crop heavily so hopefully there will be something usable :) ... I've hacked enlarger lenses on to pentax bodys and they worked quite well.

I will report back whatever the outcome. is it possible to shoot video in crop mode on the k1?
Forum: Pentax K-1 02-28-2019, 09:28 AM  
K1 how much of the sensor is used in video mode?
Posted By blackest
Replies: 11
Views: 716
Will see, soon enough It is ordered and heading from New York to Ireland. I'm hoping I get the orientation right :)
The thing that gives me some hope is the gh5 managed it and i know the 50mm lens on the k1 is quite happy looking through a 30.5mm hole
Forum: Pentax K-1 02-28-2019, 07:21 AM  
K1 how much of the sensor is used in video mode?
Posted By blackest
Replies: 11
Views: 716
hi all,

I'm thinking about buying moondog labs 1.33x anamorphic lens with the 37mm lens mount. For the iPhone, or I can get a dedicated clip version for my particular iphone.

now i use some stepdown rings to 37mm on some of my full frame lenses already usually with a 37 - 30.5 on top (lets me use a film canister top as a lens cap. :) it works pretty well on 50mm + and my 70- 210mm.

Then I saw this
















You Tube





This is on a panasonic gh5 and I kinda have a panasonic G5 and also a Pentax K5 .

So that got me wondering how much of the K1, K5 image circle is used?

I do have a few other odd bits like the panagor macro adapter an m42 helical mount various tubes...

So maybe i could use this lens with the k1, k5, or G5 maybe?

I want the lens for my iphone 7 plus anyway but its a choice between the 37mm version or a dedicated clip version for the phone. The 37mm version may need a shim to stop it tilting on the phone. Both models are the same price...

Has anyone tried this? Or will I be the first?

I guess for stills i can crop away but i do fancy trying some anamorphic video footage with my other cameras :)

So am I crazy?
Forum: Pentax K-5 01-18-2019, 03:46 AM  
Pentax K-5 and external HDMI LCD screen
Posted By blackest
Replies: 116
Views: 29,155
Hi the screen on the andycine is 1920 by 1080p and is 386 PPI it can take a 4k signal (a retina display is 326 PPI in comparison).

A 4k display would be 2x 386 PPI at that screen size. But surprisingly yes you can get a display with that resolution around that size
Here comes world's first 6" 4K AMOLED display with an unprecedented density of 734 PPI Although I don't know if there is a field monitor at that resolution, certainly not at that price.



Alternatives:

if you can use a wireless display then maybe a phone or tablet is an option

Highest ppi phones 2018, highest pixel density phone screens 2018, how to calculate PPi Pixel Density of Phone Screen, Best Pixel Density phones 2018 Sony XZ premium and Samsung Galaxy S8

GMonitor ? Apps bei Google Play
?GMonitor on the App*Store

These apps are designed for lumix cameras with Wifi but the resolution sent by wifi is only 640x480.

Interesting though maybe at some point there will be a pentax app such as for the K1. I think its going to lag quite badly over wifi to be fair.

There are other field monitors with options such as recording hdmi out as well as in and i think, sdi input which gives a less laggy input than with hdmi

Somehow I don't see Pentax producing a camera with the capability to use these features in the near future.
They do have a version of the gopro.
Specifications?WG-M2 | RICOH IMAGING

gets quite a bashing here















You Tube



I believe Amazon have them for 99 - 150 more expensive in the UK thou.
Forum: Pentax SLR Lens Discussion 01-17-2019, 04:32 PM  
What's your favourite vintage / film-era manual focus lens, and why?
Posted By blackest
Replies: 147
Views: 9,243
About the M42 lenses i use a plumbing gasket designed for a sink waste pipe which helps as a light seal, alternatively there are lipped m42 adapters now you don't get infinity focus with these but for portrait work where you want the background blurred this isn't a problem. It's also far easier to change lenses.

I've found an old cobra650 dedicated flash works well it has its own light sensor and is pretty close on getting the exposure right.
Forum: Pentax K-5 01-17-2019, 04:22 PM  
Pentax K-5 and external HDMI LCD screen
Posted By blackest
Replies: 116
Views: 29,155
I just picked up an andycine 4k monitor and it works with the k5 pretty well it has built in focus peaking zoom 4x 9x 16x, zebra striping, false color and more.

I've just checked it reads the hdmi while recording video. retail price is around /$180 i got mine for 80 euro. i also picked up recently a q-666 tripod a tourism tripod at a very light weight 3 pounds including ball head. I am dubious how good it is for eye level photography with its 2 stage centre column extended. But it seems solid enough and there is no slop in the centre column when its down.

i haven't tried it with my slider yet but i have the option to unscrew the ball head and attach that to the legs and maybe the ball head to the slider. its arca swiss and can convert to a monopod with 1 leg and the reversible centre column. The bottom of the centre column has a spring loaded hook which is removed for the monopod but rather usefully its a 3/8th female thread. so you can use it to attach say the field monitor to the base of the column when its inverted and get the camera close to the ground but upside down.

Ok you can flip the monitor screen but i have discovered my 200mm nodal rail has 2 arca swiss grooves. You can put the rail in upside down in the ball head and i used some lightstand extenders (or magic arms) and another 200mm plate to create a cage for the camera so the camera is upright but low to the ground. with the field monitor at a useful height, (a cheap selfie stick can give even more height if you need it).


One issue with the field monitor is it doesn't come with a battery or charger but it does use sony F series batteries, so i bought a daylight balanced 160 LED panel which came with a battery and charger. It wasn't that much more than it would cost for a battery and charger alone.

Anyway if you fancy a field monitor the andycine 4k is well worth a look.

its also quite handy as a secondary monitor when editing in lightroom, It can show you whats focused the contrast ratios ...

small edit it says on the box andycine A6 and on the monitor Andycine 4K
Forum: Pentax K-1 12-03-2018, 06:46 AM  
which 50 (or 55)
Posted By blackest
Replies: 19
Views: 1,102
Havent updated my profile for a while , I also have a K5 and a K1, Film Cameras include the k1000, Me super, SFXn and a Z1P (a great option for full frame on a budget almost a DSLR) . A few other misc SLR's and an old Canon 1D MkII. Did have a Panasonic G5 but I never got on with it. Ebay often has a few film camera set ups for very little money and some have decent lenses included. E.g i bought a Zenit E with Helios 44 m2 for less than most sellers sell that lens for alone. A nice realisation was that the flanged M42 adapters which are much easier to remove than the Pentax infinity adapter work well providing you don't need infinity focus. :)
Forum: Pentax K-1 12-03-2018, 05:35 AM  
which 50 (or 55)
Posted By blackest
Replies: 19
Views: 1,102
It's not so much need as have, The f1.7 M and A versions came as part of buying cameras with a number of lenses and other kit. I usually pick these deals up pretty cheaply. I have a certain amount of LBA ... and too many camera's this has been going on for many years starting with my k1000
Forum: Pentax K-1 12-03-2018, 05:01 AM  
which 50 (or 55)
Posted By blackest
Replies: 19
Views: 1,102
There are lots of 50mm lenses and 55mm too (I think that 55mm is close enough to include).
I have the F1.7 M , A and now F and a few third party lenses too. Should I have bought the FA ? I bought the F mainly for the AF capability

Have you a favourite , any preferences on hoods?
Forum: Pentax K-1 10-19-2018, 09:41 AM  
Post your K-1 pictures!
Posted By blackest
Replies: 23,193
Views: 1,956,733
K1 with sigma 28mm macro A
Forum: Pentax K-1 09-23-2018, 02:22 PM  
Post your K-1 pictures!
Posted By blackest
Replies: 23,193
Views: 1,956,733
sigma superwide, trying to get a new angle on things 1/160th f4.5 ISO 100
Forum: Pentax K-1 09-03-2018, 12:34 PM  
Post your K-1 pictures!
Posted By blackest
Replies: 23,193
Views: 1,956,733
Went on Ebay last weekend and picked up a pentax F 70-210 f4 - f5.6 for 9.50 (around $12) it arrived today. It's just a 49mm filter size so I used my step ring , hood / Lenscap (49-37 + 37-30.5) the cap is actually a film canister lid.
Forum: Pentax K-1 08-22-2018, 10:12 AM  
Is the K1 a foolish choice if you don't have any modern glass ?
Posted By blackest
Replies: 77
Views: 4,514
Quality doesn't necessarily mean expensive. Liveview IBIS and a good prime :) I'm loving it. It's also worth considering that larger negatives tend to need less enlarging which keeps aberrations under control. The K1 is a great camera, especially if you are willing to move to get the shot you want.
Forum: Pentax Full Frame 08-16-2018, 09:57 AM  
Poll: What should the next Pentax Full Frame be?
Posted By blackest
Replies: 161
Views: 7,941
That would be problematic, apart from direction of the plate how would you attach a battery grip?
Forum: Pentax K-1 08-16-2018, 09:49 AM  
Is the K1 a foolish choice if you don't have any modern glass ?
Posted By blackest
Replies: 77
Views: 4,514
I was wrong on the max focus distance with the adapter e.g for 90mm 9mm from the focal length is focusing at 10x focal length and 0.9mm would be 100x focal length. for say 45mm then the figure is 4.5mm 10x and 0.45mm for 100x because the adapter is about .9mm thick you get about 100x on the 90mm but less on the 45mm it's not such a simple relationship with the thickness of the adapter being constant. But the 85 and 135mm lenses have a reasonable working distance. probably the 55mm too
Forum: Pentax K-1 08-14-2018, 04:46 AM  
Post your K-1 pictures!
Posted By blackest
Replies: 23,193
Views: 1,956,733
A couple of weeks ago someone posted a shot with a m42 lens with a non infinity focus m42 lens. This lead me to the thought infinity focus isn't that important.
(actually just made me think with 2 of these adapters I can easily use any lens with my m42 bellows, I bought 4 for around €6).

With the m42 135mm jupiter 11a preset lens infinity focus seems to be around 50 feet. or around 28-30x the focal length. This is a handy figure so with an adapted 28mm that makes the furthest focus distance about 84cm and an 85mm a more useful 2.55 meters. A helios 55 mm might do 1.65 meters Personally I find the infinity focus m42 adapters really awkward to switch between k mount and m42 so i've tended to avoid using them along with potential light leaks on narrow lenses. I think this adapter now opens up possibilities for a lot more use :)



Actually seems I was quite a bit off, I was getting focus on a jupiter 9 at around 27 feet or so around 96 x focal length or maybe close to 100x :) which makes the math simpler.
Forum: Pentax K-1 08-14-2018, 04:24 AM  
Is the K1 a foolish choice if you don't have any modern glass ?
Posted By blackest
Replies: 77
Views: 4,514
This is just a quick snap using a 135mm jupiter 11a preset lens on the k1 using a non infinity m42 adapter. The adapter has a 0.97mm flange and infinity focus is about 50 feet very roughly that is around 28 ~ 30 x focal length.

so for say a 28mm lens with that adapter about 84cm 1.5 meters for a 50mm 2.55m for an 85mm for working distances thats getting a tad short but i think the 85mm might be pretty nice :)
Forum: Pentax K-1 08-10-2018, 08:37 AM  
Post your K-1 pictures!
Posted By blackest
Replies: 23,193
Views: 1,956,733
from this afternoon
Forum: Pentax K-1 08-06-2018, 10:45 AM  
Post your K-1 pictures!
Posted By blackest
Replies: 23,193
Views: 1,956,733
Which lens did you use for these, unfortunately there is no exif for these. They look great.
Forum: Pentax SLR Lens Discussion 08-03-2018, 03:39 PM  
What's your favourite vintage / film-era manual focus lens, and why?
Posted By blackest
Replies: 147
Views: 9,243
Moose Peterson Warm Circular Polarizer
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Or an 81A warming filter
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