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Forum: Pentax DSLR Discussion 10-01-2020, 03:23 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
I tried out another night sortie yesterday. ISO capped at 25600 for 645Z with 90mm f/2.8 and shutter speeds between 1/125 and 1/180, hoping that the at least 2 stop SR of the lens would give me decent images.

I repeated the same for K1 with 77mm, ISO capped at 12800 and shutter speeds between 1/60 to 1/250.

Most shots were from some distance between the chopper and the subject. So, the relative motion was slow.

I am yet to evaluate the images, but prima facie, I do not see much improvement.

So, you are right. Quite possibly, the overall light intensity of the city is not adequate and even if one uses gyro stabilisers like the Kenyon ones, as long as you are moving, with some relative motion between you in the chopper and the subject being photographed, you are unlikely to get decent images. However, if you hover in one place, then a highly stabilised set up including external gyro stabilisers might give decent images, if you bring down the shutter speeds to low ones like 1/30 to 1/60 at ISOs ranging from 25600 to 6400.

The only other option for images with aerial perspective is to climb on high rise buildings and take pictures of the world below :)

I will continue with the daytime aerial photography, which is comparatively reasonably simple for me.

I have only gone through the images using Adobe Bridge and Photoshop.

I will try out the DxO and Topaz software.
Forum: Pentax DSLR Discussion 09-29-2020, 11:21 PM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
Thanks UncleVanya.

Sorry I meant 50mm f/1.4 on one of Sony AS ii OR Nikon D4/D5 OR Canon 1Dx ii. However, none of the 50mm f/1.4 lenses have IS/SR. closest is 24-70 f/2.8 VR of Nikon and maybe Canon. But I lose 2 stops here. Every single 1/3 stop also matters in this kind of photography.

So, if you say D4 etc are nothing great in high ISO performance, then the K1 with 50mm f/1.4 would be the better choice under present circumstances ��
Forum: Pentax DSLR Discussion 09-29-2020, 09:29 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
Hello all,



So finally, I went up in the helicopter during the day a few days ago. Got decent images. Can't post right now under terms of contract with the agency for which the images are shot. Used Pentax 645Z with 28-45 f/4.5 and Fujifilm XT-4 with 16-55 f/2.8.



I also flew in the night yesterday for some time. Used Pentax 645Z with 55mm f/2.8 and Pentax K1 with 77mm f/1.8. No gyro stabilisers in the chopper or a portable one. Shot mostly at 1/500 with lenses wide open in TAv mode, with ISO restricted to 25600.



First, at these settings, almost all images were at ISO 25600. Almost all are pretty dark. If I attempt to bring out the details on Photoshop, the noise gets highly visible. It is quite possible that even at ISO 25600, the images are highly underexposed. The city isn't as brightly lit as most big cities in Europe or US or Australia.



So, the only choice with available gear is to shoot at much lower shutter speeds like say 1/125 and try to gain two stops so that I can bring the ISO to say 6400, at which the images are expected to be OK, provided at ISO 6400 itself the images are not underexposed.



We are flying at about 700 to 1000 feet max. The weather is gorgeous, the visibility is good but my existing kit simply doesn't look upto it to get decent images.



I am flying again tomorrow. I don't seem to have any choice but to hire a better camera lens combination.



I thought of Sony As 7 ii as an option. It is full frame and only 12 MP and is supposed to have astounding high ISO performance. I will pair it with a fast prime like 35 or 50mm f/1.4 or else try my luck with 24-70 f/2.8 (and lose two stops). With 5 axis IBIS and a fast prime, maybe I will get decent details.



Alternatively, I will get the Canon 1Dx or Nikon D5 with a fast prime like 50mm f/2.8.



I have only tonight to make up my mind.



I would be thankful for some advice.
Forum: Photographic Technique 09-25-2020, 08:44 AM  
Famous photographers using Pentax
Posted By leonine
Replies: 54
Views: 47,326
Surprising that everyone missed out Nick Brandt... Or maybe I missed out a post that mentioned Nick Brandt.
Forum: Pentax DSLR Discussion 02-26-2020, 11:22 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
I read up quite a bit on the gyros of Ken-Lab. Interesting products. Does anyone here have any experience with them? Which would be an optimum one for the Pentax 645Z and a heavy lens like 28-45?

Another important thing - We are supposed to switch off the SR (in lebs or in body, whichever you have) when using the camera on a tripod.

Are we supposed to switch off the SR when the camera set up is mounted on a compact portable gyro like those manufactured by Ken-Labs?
Forum: Pentax DSLR Discussion 02-16-2020, 08:44 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
Thank you very much for your kind advice. The points you have brought out are extremely important and are on my check list. Hopefully, i will be going over the city at least twice maybe thrice.
Forum: Pentax DSLR Discussion 02-15-2020, 12:37 PM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
I am in a similar situation. So 28-45 on 645Z and 77mm on K1 could be optimum solutions to the quandary.

---------- Post added 02-15-20 at 12:40 PM ----------



The 645Z and the K1 fit the bill here. The Fujifilm isn't supposed to be as good in high ISO performance.

Typically, i think the TAv mode with shutter speed at 1/500 sec should do the trick in most situations. I will vary aperture if necessary.

---------- Post added 02-15-20 at 12:44 PM ----------



I could get another Fujifilm lens too. But i am more concerned about learning to use a new camera from a scratch besides the EVF of the Fujifilm.

---------- Post added 02-15-20 at 12:46 PM ----------



I got the Planit Pro. But i am yet to learn to use it. Prima facie, it doesn't look very intuitive. But i may not have tried hard enough and may be wrong.
Forum: Pentax SLR Lens Discussion 02-15-2020, 12:32 PM  
Filters for Irix 15mm f/2.4
Posted By leonine
Replies: 5
Views: 469
Indeed it is. But i need to find a way out of it.
Forum: Pentax SLR Lens Discussion 02-14-2020, 10:40 AM  
Filters for Irix 15mm f/2.4
Posted By leonine
Replies: 5
Views: 469
I just spent a tidy sum on the Breakthrough Photography filter holder system. I am hoping to optimize that system for the Irix.
Forum: Pentax DSLR Discussion 02-14-2020, 10:38 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
That must have been a great experience, flying in the Cessna.

I am coming around to believe that i should shoot through the best available glass on the best available sensor, and then crop if necessary, than sacrifice lens quality for the sake of a longer focal length.

That means

(1) 50mm f/1.4 on K1 & 90mm on 645Z

Or

(2) 77mm on K1 & 28-45 on 645Z

for daytime.

For flights in blue / night hours, maybe 50mm f/1.4 on K1 and 77mm f/1.8 on K3.

Does this sound ok?

Anyway, i am surprised none is taking the Fujifilm GFX100 into account.
Forum: Pentax DSLR Discussion 02-14-2020, 09:15 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
Goodness gracious.... This is exactly what i was looking for. Now, if only you could share where i could buy this machine and the U2, i would just go over next week and pick them up ��

50mm f/1.4 would help on K1. I could rent it.

And maybe 90mm on 645Z and forget everything else including the wide angle lenses?

Perhaps i could try out combinations in one or two short duration trial flights and then decide the optimum combinations.

Else, go with three cameras and see if it works....
Forum: Pentax DSLR Discussion 02-14-2020, 08:57 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
Thank you for your comments.

I will choose the flight paths and number of passes. That is not a problem. Also, except in areas closer to the airport, i can come down reasonably low, particularly flying over the sea.

I guess every flight would need to be planned in detail. Google map satellite views would certainly help.

The chopper doors would be off.

The reach upto 135 or even 150/200mm would help in specific situations. But carrying a heavy 70-200 f/2.8 (on rent) would be tiresome.

With chopper doors off, i won't be allowed to change lenses under any circumstances.

I would be flying in the golden hours, the blue hours and maybe twice in the night. I would avoid mid day shooting.
Forum: Pentax DSLR Discussion 02-14-2020, 08:30 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
I guess one lens needs to be a medium telephoto like 77mm on K1 (helped by IBIS) or 90mm on 645 (helped by SR in lens). That would allow close ups of parts of city that may form a good composition.

Then i guess i would need to decide on one wide angle. 28-45 on 645Z has SR but is heavy, 35mm on 645Z is tempting because it is lighter and also has one stop advantage in aperture but doesn't have SR.

The Fujifilm GFX100 has IBIS but i have never shot mirrorless cameras and I wonder how the EVF of Fujifilm will hold against the OVF of 645Z. Reaction time is critical in the air much like wildlife action Photography. Of course, if you miss the shot in the air, you could turn the chopper back, but the pilots are never happy about it.

---------- Post added 02-14-20 at 08:33 AM ----------

And yes, i am thinking of not going far from the shore..... just at a reasonable distance and then maybe swivel the chopper in one spot to get maybe 5 odd shots to stitch the panoramas. I haven't done it before. It is an experiment. If it doesn't work, i will go further away from the shore to capture the city but then i will lose resolution in heavy cropping.

---------- Post added 02-14-20 at 08:41 AM ----------

90mm on Pentax 645Z gives me 70mm effective focal length with respect to 35mm format. But it is a f/2.8 lens against the f/1.8 of 77mm Ltd on K1.

Or maybe i could just hire one more 645Z and go with both SR lenses - 28-45 & 90mm,or else 35mm & 90mm.

I guess two similar bodies could also help in faster reaction times. I found in Africa a few months ago that having different bodies is actually a problem. But again, it is difficult to be able to afford two 645Z bodies.
Forum: Pentax SLR Lens Discussion 02-14-2020, 08:00 AM  
Filters for Irix 15mm f/2.4
Posted By leonine
Replies: 5
Views: 469
Specifically, how good would be the following item?

It is very cheap and hence can't say how it will perform. Then again, established brands charge crazy prices like USD 100 plus for just a step up adapter ring.

Zomei 100mm Square Filter Holder+95mm Ring for 4X4 LEE Cokin Z HITECH system 699964374977 | eBay
Forum: Pentax DSLR Discussion 02-14-2020, 07:55 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
Thanks Chris and Rob.

What are your views on the Fujifilm GFX100 with the 23mm lens?

I would be shooting the cityscape, specific buildings which are architecturally important, arterial roads, the traffic, night photography of city including its empty streets, complete city view with part of sea visible (perhaps as a stitched panorama while shooting from just a few feet hovering above water) etc.

Regards.

---------- Post added 02-14-20 at 07:57 AM ----------



Thank you. I will request Mr Google to translate for me 🙂

Looking at his photos, i should get an idea on types of lenses to be used for specific situations.
Forum: Pentax DSLR Discussion 02-14-2020, 05:01 AM  
Best camera-lens combos for aerial photography
Posted By leonine
Replies: 29
Views: 1,837
Hello all,

I may get an opportunity to do some aerial photography over a coastal city in near future.

My available kit is (all AF lenses, except where mentioned)

(a) Pentax 645Z - 28-45mm, 35mm, 55mm, 90mm, 150mm (manual focus)

(b) Pentax K1 - 77mm Ltd, 15mm Irix

(c) Pentax K3 body

I might perhaps be able to rent a Fujifilm GFX100 with one of the Fujifilm lenses ( my choice is GF 23mm f/4 for now)

Well, the restriction in the air is that I WILL NOT BE able to or allowed to change any lenses (or carry any loose stuff which might fall off the chopper). But I could have 2/3/4 cameras dangling around my neck (as long as I am comfortable with that prospect); however, I think more than three cameras would create a lot of interference and I might lose good angles in just trying to pick up the right camera. I guess I should be able to handle the technical complexities for shooting from a vibrating platform in the air.

The major goal is to create some fine art aerial pictures too (other than shooting record/ reportage images) like vertical/ horizontal panoramas etc of the city skyline. There will also be a few sorties in the twilight times and the night time.

I would be thankful to get some advice/ views (generic as well as specific to aerial photography). Pls also refer to any excellent resources on the internet on aerial photography and work by any good aerial photographers using the Pentax/ Fujifilm MF systems (or FF systems).

Regards,
Leonine
Forum: Pentax SLR Lens Discussion 02-14-2020, 04:45 AM  
Filters for Irix 15mm f/2.4
Posted By leonine
Replies: 5
Views: 469
Hello all,

I bought an Irix 15mm f/2.4 a few days ago for use on the Pentax K-1. I also have the 28-45mm for the Pentax 645Z, but wanted a wider lens which was easier to handle than the Pentax 15-30 on the K-1.

I also bought the following from Breakthrough Photography a few months ago for use with the MF lenses for 645Z:-

(1) Step-Up Ring 67mm to 82mm (for use with 55mm 645 lens)

(2) X4 Neutral Density filter - 100mm Square / 6-stop

(3) X100 filter Holder - 82mm Aluminum Square Adapter Ring (for use with 28-45mm 645 lens)

(4) X100 Holder

I already had the old Singh-Ray 100mm square filters - GND, Tobacco/ Blue/ Gray Graduated etc from the film area.

The Irix dia is 95mm. There is no 95mm adapter ring available from Breakthrough Photography; however, the same is available form Lee and maybe a few more local companies.

My question is:- Will the Lee 95mm adapter ring (meant for the Lee filter Holder) allow the use of the Breakthrough Photography X100 filter holder for Pentax K-1?

Regards,
Leonine
Forum: Pentax Medium Format 01-15-2020, 08:06 PM  
Pentax 645 Rear Converter 1.4X and 2X
Posted By leonine
Replies: 10
Views: 948
Thank you very much for your comments. I will be getting the 1.4x soon. I will try out all possible combinations.
Forum: Flashes, Lighting, and Studio 12-31-2019, 07:12 AM  
Portable Flash System for Portraits - Australia Road Trip
Posted By leonine
Replies: 18
Views: 1,241
Thank you very much
Forum: Sold Items 12-29-2019, 10:57 PM  
For Sale - Sold: Pentax K-1, 100/2.8, Sigma 17-35/2.8-4, 85/1.4, Tamron 28-75/2.8, 70-200/2.8, 1.4x, +
Posted By leonine
Replies: 19
Views: 3,116
PM sent
Forum: Flashes, Lighting, and Studio 12-23-2019, 11:35 AM  
Portable Flash System for Portraits - Australia Road Trip
Posted By leonine
Replies: 18
Views: 1,241
Hello everyone,

In India, I am unable to sell off my Canon speedlite as well as Cactus V5 units.

I was wondering about another possibility.

I need the main on camera flash to be P-TTL compliant because I guess I will be mostly using a single flash for almost all outdoor and majority of indoor portraits. When I need the second flash too, I am ok with manually adjusting the second slave flash power output with a bit of trial and error.

Therefore, if I buy a single V6 Cactus Tranceiver and mount a Pentax 540GZ II on it, will I have complete P-TTL features available when I mount this combination on the hot shoe of the K1 and K3?

Then, can I mount the Canon Speedlite on a V5 receiver and trigger it off camera as a slave unit?

Well, I also have a 30 year old small Yashica flash which works. Will I be able to mount it on another V5 receiver and trigger it too as the third flash (second slave)?

If this works, it will be a cost effective solution for me while ensuring that I continue to use my existing Canon speedlite and V5 transceivers.
Forum: Sold Items 11-30-2019, 05:56 PM  
For Sale - Sold: (Sold) K1ii + DFA28-105, DFA15-30, FA77 Limited and Rokinon 135/2.0
Posted By leonine
Replies: 14
Views: 2,348
Bump. I purchased the much talked about 77mm. It was a pleasure interacting with @iGarfinkle.
Forum: Pentax Medium Format 11-29-2019, 05:30 PM  
Carl Zeiss Tele-Tessar 500mm f/5.6 for Pentax 645Z
Posted By leonine
Replies: 5
Views: 1,027
Thank you Ed.
Forum: Pentax Medium Format 11-29-2019, 02:11 AM  
Carl Zeiss Tele-Tessar 500mm f/5.6 for Pentax 645Z
Posted By leonine
Replies: 5
Views: 1,027
Hi. Nice to see you here.

I have posted a few images on some other threads. Still working on the other images. Don't get much time for it nowadays :-(

---------- Post added 11-29-19 at 02:15 AM ----------



Thanks.

Another interesting lens is the Leitz 560mm f/5.6. I wonder how it performs on the digital sensor. Also, how would you adapt it to the 645Z, K1 and K3?

Why I am exploring these lenses is because to use anything beyond 400mm on the 645Z, you anyway need to use MF lenses. Then why not these Zeiss or Leitz old lenses, which were reportedly reputed during the film era and are now available at ridiculous prices?
Forum: Pentax Medium Format 11-28-2019, 11:55 PM  
Carl Zeiss Tele-Tessar 500mm f/5.6 for Pentax 645Z
Posted By leonine
Replies: 5
Views: 1,027
Hello all,

The most likeable of the images I shot in the Masai Mara came from Pentax 645Z and not the K1 or K3 ii, despite all the limitations of the 645Z.

I own the 645 lenses 300mm f/4 and 400mm f/5.6. I have been thinking of buying a 645 A* 600mm f/5.6 lens. However, good copies are all upwards of USD 2000.

Then I read about this interesting lens Carl Zeiss Tele Tessar 500mm f/5.6. It is at least 40 years old, but could be bought at less than half the price of the Pentax 600mm. It is however a Hasselblad lens adapted to Pentax 67, and would need to be further adapted to the 645Z, whereas the Pentax 600mm could be directly mounted without any associated paraphernalia. And the Pentax is an ED lens whereas the Zeiss is unlikely to have any ED elements due to its vintage. The Zeiss weighs 2 kg and seems to be unused.

Does anyone have any first hand experience with this Zeiss lens? Any thoughts? Any conjectures or theoretical musings?
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