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Forum: Troubleshooting and Beginner Help 04-10-2021, 10:07 AM  
Pentax 645N light leak - your thoughts?
Posted By Denver
Replies: 9
Views: 506
the most common is the light seals on the film back, or failure to rotate the lock on the film back
Forum: Troubleshooting and Beginner Help 04-10-2021, 09:40 AM  
Pentax 645N light leak - your thoughts?
Posted By Bas Stubert
Replies: 9
Views: 506
I gather that the photo doesn't appear automaticly? If you 'click to view photo' you'll see what happened. All images suffer from the same sort of leak.

EDIT: I've added an example as attachment.
Forum: Welcomes and Introductions 03-30-2021, 09:21 AM  
Hello from US/Wisconsin
Posted By CaptNemo
Replies: 6
Views: 311
Thank you all for the warm welcomes! I'm taking my time to find a good deal on the K-70 or KP, but am happy to be part of this helpful community.
Forum: Pentax SLR Lens Discussion 03-27-2021, 09:34 AM  
Macro advice
Posted By Apet-Sure
Replies: 15
Views: 867
The lens you have in mind is an excellent choice as others have said. I have one of its predecessors, the Pentax-F 100mm f/2.8. I bought it used and have been super happy with it.

You say you are a beginner. Are you aware of the relationship between lens aperture and depth-of-field? This is an important concept in macro photography. You may want to read this article: The Fundamentals of Exposure - Introduction - In-Depth Articles Pay particular attention to page 5, which discusses aperture and depth-of-field. In macro photography, the closer you are to the subject the shallower the d-o-f will be. For a Pentax APS-C camera with a 100mm lens set to a focusing distance of 12 inches and f/2.8 for instance, the total depth of field is 0.04 inches! So the bug's nose may be in focus and its eye may not. Stopping the lens down improves dof as does moving farther away from the subject. There are several online dof calculators; this is my favorite: A Flexible Depth of Field Calculator

A 100mm lens is a good choice for skittish subjects like dragonflies because you can be farther away from the subject. For plants a 50mm or 35mm macro lens will give you greater depth of field by default. In the above example, going from a 100mm lens to a 50mm lens changes the dof to 0.16 inches, and increasing the focus distance to 24 inches raises the dof to 0.63 inches. It's all a trade-off, because the farther away you are the smaller the subject will be in the viewfinder. If your camera has lots of megapixels you can crop the image to make it look like you were closer.

If I'm shooting close with my 100mm lens, the aperture is usually set to f/8 or smaller. Macro photography is a lot of fun, but the dof can be razor thin depending on distance and aperture. Some people take a series of shots where they are making tiny adjustments to the focus point each time, and then stack the images in software designed for the purpose. The results can be stunning, but it takes a fair amount of effort.
Forum: Post Your Photos! 03-08-2021, 05:57 PM  
Machinery Gray and Brown
Posted By Sailor
Replies: 18
Views: 671
Yesterday, I drove my freshly-waxed Carrera to the local college for its first "official" photos - top up. The car is a light gray (dubbed "Chalk"), one of Porsche's "special" colors designed to yank cash from a buyer's pocket and baffle the sensors and RAW processors of digital cameras. To the human eyeball and neuron processing system, the color is a subtle, sexy shade of gray but photographically renders itself as a range of colors (ivory, almond, off-white and - on rare occasion - gray) depending on conditions; even the Porsche configurator gets it wrong. :hmm:

Here are a couple of "compressed" shots of the car. The first one is in color which manages - after all kinds of fiddling with PP - to darkly approximate the actual color of the car; the second one is B&W. Note the brown palm leaves and other flora left behind by the "deep freeze" we experienced a couple of weeks ago.

Jer


3/4 View f/9.5 by Jerry White, on Flickr

BW 3/4 View f/11 by Jerry White, on Flickr
Forum: Photo Critique 03-12-2021, 04:40 AM  
Landscape Vineyard hut
Posted By Ginos
Replies: 9
Views: 532
:lol:

---------- Post added 03-12-21 at 04:41 AM ----------



:lol::lol:

---------- Post added 03-12-21 at 04:42 AM ----------



I prefer to clone - to intervene as little as possible in the image, especially in terms of static elements of the landscape. I always try to integrate them into the "narrative".
This photo is taken in a very urbanized area, it is a part that preserves the rural essence in a very densely populated and industrial area. I like to have some element that reminds us of it.

Thank you very much for your comment!
Forum: General Photography 03-08-2021, 12:34 PM  
Is there a future for DSLR (outside old duffers like me?)
Posted By MossyRocks
Replies: 94
Views: 3,494
Neither have I. The 2 lenses I bought thinking I would resell them have resulted in me not reselling them and instead they have become some of my more used lenses.

I will probably keep with using DSLRs and SLRs going forward because I like the optical view finder and in some cases the optical viewfinder really is superior. For example when doing astro shooting and one need to reposition I don't have to look at an electronic one and lose my night vision and instead I can just look through the viewfinder and reposition. Having not used an electronic viewfinder I do wonder if they can they even show some of the faint stars you get in the field when shooting some objects. I know live view struggles with stars that aren't super bright.
Forum: General Photography 03-08-2021, 12:22 PM  
Is there a future for DSLR (outside old duffers like me?)
Posted By stevebrot
Replies: 94
Views: 3,494
Me neither. That probably explains why I have so many cameras.


Steve
Forum: Post Your Photos! 02-28-2021, 01:05 AM  
Machinery I kind of
Posted By eaglem
Replies: 2
Views: 161
It seems to work well from what I've seen :)
Forum: Post Your Photos! 02-25-2021, 07:43 AM  
Misc Miniature: 1/64 scale Jet Car model
Posted By ismaelg
Replies: 4
Views: 300
Hello,
I started this in 2015 but it was until 2021 it was finished. Modified Hot Wheels Salt Shaker.
Scratch built canopy, rear wing with supports and parachute. Machined parachute tube. Paint is 1956 Chevrolet Nassau blue (one of the many colors with that name). Gotta have a Chevy connection somewhere :)







and the spoiler picture
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Thanks,
Forum: Post Your Photos! 02-25-2021, 04:12 AM  
Abstract All
Posted By Kerrowdown
Replies: 12
Views: 358
Lights & Horns
Forum: Pentax News and Rumors 02-20-2021, 07:57 AM  
K3III Delayed... indefinitely
Posted By Larrymc
Replies: 509
Views: 32,576
Many of us won't touch until the one we order has arrived, so there is value in some of these reviews. Hopefully most will be unbiased reviews.:)
Forum: Post Your Photos! 02-15-2021, 05:20 AM  
Machinery JFK Revisited
Posted By Kerrowdown
Replies: 10
Views: 353
Great gritty image of a floating city...
Forum: Post Your Photos! 02-14-2021, 07:15 AM  
Nature Small Beauty
Posted By Kerrowdown
Replies: 8
Views: 286
Thank you. :)
Forum: Post Your Photos! 02-13-2021, 12:44 PM  
Machinery I Sing the Body Electric . . . . . . . .
Posted By Sailor
Replies: 26
Views: 714
Actually, I think some of them already have this feature. I'm pretty sure Taycans - at least some versions - have a driver-selected "sport" soundtrack, and I dimly remember seeing something similar said about one of the Tesla models.

Jer
Forum: Pentax KP 02-11-2021, 05:18 PM  
Is the Sigma 18-50mm f2.8 a Good Pairing for the KP?
Posted By mikesbike
Replies: 17
Views: 875
I too have this Sigma 17-50mm f/2.8 EX DC HSM, use in on my KP and it is indeed just as good as described here^. I prefer using the largest supplied grip with it, and with the great matchup- a DA* 50-135mm f/2.8 as well. The f/2.8 aperture throughout is a major advantage, with a brighter VF and superior shutter speed especially for low light use. That said, my DA 20-40mm Ltd is also a fine pairing with this DA* tele-zoom, when f/4 is good enough for the need, and the reduced FL range is good enough also. It is more compact, very well-built, and offers WR throughout.

Worth noting, a new Pentax DA* 16-50mm f/2.8 PLM lens with top-flight WR construction is due to arrive soon, but will no doubt cost a whole lot more.
Forum: Pentax KP 02-11-2021, 03:49 PM  
Is the Sigma 18-50mm f2.8 a Good Pairing for the KP?
Posted By AgentL
Replies: 17
Views: 875
Yes, 17-50mm. Fingers got confused.
Forum: Pentax KP 02-11-2021, 03:29 PM  
Is the Sigma 18-50mm f2.8 a Good Pairing for the KP?
Posted By gatorguy
Replies: 17
Views: 875
I've used the Sigma 17-50 on several portrait shoots. It's an underappreciated lens IMO, better overall than either the Pentax 16-50 or the Tamron based on reviews around the web including a comparison review here at PentaxForums.
DA* 16-50mm vs. Sigma and Tamron 17-50mm F2.8 Comparison Review - Introduction | PentaxForums.com Reviews
Forum: Pentax KP 02-11-2021, 03:00 PM  
Is the Sigma 18-50mm f2.8 a Good Pairing for the KP?
Posted By seventysixersfan
Replies: 17
Views: 875
Assuming you mean sigma 17-50mm, it's excellent but a bit bulky. I used to have the old sigma 18-50 (first version, 445 grams, 67mm filter size) which was okay but not stellar. The second version of the 18-50 had "macro" in the name and weighed about the same though has a larger 72mm filter. I later got a sigma 17-50 (565 grams, 77mm filter size) which was outstanding, quiet focusing (HSM motor), and performed optically very well on my KP. Used the largest KP grip, and even better to use the battery grip attachment.
Forum: Pentax KP 02-12-2021, 05:49 AM  
Is the Sigma 18-50mm f2.8 a Good Pairing for the KP?
Posted By Jonathan Mac
Replies: 17
Views: 875
I briefly owned an 18-50mm/2.8 but it was very soft wide open, negating the usefulness of the speed, though of course this could have been just my copy. I returned it and got the Tamron 17-50/2.8 instead and that served me very well for a number of years. The Sigma 18-50/2.8 didn't last long on the market (suggesting that it wasn't just my copy that had problems) and was replaced with a 17-50/2.8 which is vastly superior, though bigger and heavier. I've had one for a few years and sold the Tamron shortly after buying it.

The 17-50mm is a lens I'd heartily recommend, the 18-50mm is not.
Forum: Ask B&H Photo! 01-07-2021, 10:25 AM  
What do you do with defective cameras?
Posted By henryp
Replies: 4
Views: 2,349
I am glad we could resolve this amicably and grateful you took the time to say so here.
Forum: Ask B&H Photo! 01-06-2021, 12:32 PM  
What do you do with defective cameras?
Posted By Huss
Replies: 4
Views: 2,349
Update.

Henry reached out and took care of this. I was refunded the cost of the repair (after I had sent the paid invoice for the repair of course).

This is exemplary customer service, and they made me a very happy and satisfied customer!

Thanks so much Henry and B&H.
Forum: Post Your Photos! 01-29-2021, 08:34 PM  
Misc HOBBY: 2019 Corvette ZR1 1/24 Scale Model
Posted By ismaelg
Replies: 6
Views: 327
Thanks! Not at Scale Auto, but I am "the Corvette guy" at Model Cars Magazine and the Motorsports Modeling forums. Also in the Hobby Heaven board decades ago. I was also the owner and webmaster of ScaleCorvettes.com but shut it down years ago due to time limitations.
Forum: Post Your Photos! 01-27-2021, 02:31 PM  
Landscape Long Exposure
Posted By Kerrowdown
Replies: 15
Views: 543
It'd good not to be alone... ;)
Forum: Post Your Photos! 01-26-2021, 04:14 PM  
Landscape Long Exposure
Posted By Kerrowdown
Replies: 15
Views: 543
The old Kerrowdown has that at least in common with the Greeks. :lol::lol::lol:
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