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Forum: Pentax SLR Lens Discussion 07-31-2018, 10:02 PM  
How many lenses do you have?
Posted By Boris_Akunin
Replies: 1,792
Views: 152,785
Sony A7, I just prefer the form factor and EVF + short flange distance makes a mostly manual kit more practical. In rough conditions I'll take the K-5 + DA18-135 (I barely trust the A7 in a light drizzle...).
I had hoped Pentax would make the jump to mirrorless with the K-1 (an A7-style body with Pentax-style controls & weather sealing would be my ideal camera).

It's too late to sell the K-5 at a decent price and it still has a place but if selling the K-5 + DA18-135 would make up the price difference between a used A7 (I bought mine used for 600) and a new/used A7III, I'd sell it in a heartbeat.
I don't think I'll ever sell all my Pentax stuff (I'll give you my K28/3.5 when you pry it from my cold, dead hands!) and there are a couple of manual Pentax lenses that I wouldn't mind having but I'm done investing in the Pentax system.
I have more fun with manual Pentax lenses on the A7 than I ever had on the K-5...
Forum: Pentax SLR Lens Discussion 07-31-2018, 02:33 PM  
How many lenses do you have?
Posted By Boris_Akunin
Replies: 1,792
Views: 152,785
I've hovering between 15 & 20 for quite some time, 18 at the moment.

Pentax K: 4
DA18-135
F35-70
M50/1.7
K28/3.5

Sony (F)E: 2
FE 85/1.8
Samyang 35/2.8

Minolta SR: 4
MD 35/2.8
MC 50/1.4
MD 200/4
MD 75-150/4

Canon FD: 5
nFD 24/2.8
nFD 35/2
nFD 50/1.4
nFD 300/5.6
nFD 35-105/3.5

M42: 1
Helios 44-2

Fixed lenses: 2
Yashinon 80/3.2 & 80/3.5 in a Yashica EM TLR
Forum: General Talk 07-31-2018, 12:23 PM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
But will they blend stack?


I picked up a couple more camera backs (used Crumpler bags are very cheap for some reason)
Attachment 414879
Crumpler "Cupcake 5500" & "Pretty Boy 7500 XXXL" (will Crumpler ever run out of stupid names?)



But, in the current hot & humid weather (for northern Germany, anyway)... *wipes tear* giant floor fan, you da real MVP.
Attachment 414880
rotor diameter: 20"/51cm


EDIT: And a 480GB Crucial BX300 SSD (for 62.10€), Mediamarkt seems to be clearing out some overstock/old models.
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 07-27-2018, 09:07 AM  
The Sony A7 series picture thread -- bring your base, S, and R pics here!
Posted By Boris_Akunin
Replies: 206
Views: 21,332
Looks good! (as is to be expected from the Bokina)

How is the adapter coping with that rather heavy lens?
Forum: Pentax Film SLR Discussion 07-26-2018, 07:41 AM  
Gear P0rn - post it if you got it.
Posted By Boris_Akunin
Replies: 7,588
Views: 954,639
It won't work on the nicest bodies but the Super A / Super Program & MZ-S (for AF) aren't too bad...



My current active kit (minus the K5 + DA18-135WR for harsher environments):

(To stay on topic, there's a Pentax hidden in there)

nFD300/5.6 | nFD35-105/3.5 | Sony FE85/1.8
nFD50/1.4 | A7 + Samyang FE35/2.8 | nFD24/2.8
nFD35/2 | Pentax K28/3.5
K&F Concept FD/FE adapter | Fotodiox Pro PK/FE adapter
Forum: Non-Pentax Cameras: Canon, Nikon, etc. 07-24-2018, 09:25 PM  
The Sony A7 series picture thread -- bring your base, S, and R pics here!
Posted By Boris_Akunin
Replies: 206
Views: 21,332
Well, the screw drive noise depends on the lens but the Samyang is nowhere near as loud as the F35-70/3.5-4.5 (the only screw-drive lens I have left) on my K5. It's actually a bit quiter than the DC motor in the DA18-135, so not much of an issue. The FE85/1.8 is basically silent though, as are most Sony lenses (apart from e.g. the FE50/1.8).
Forum: General Talk 07-24-2018, 08:51 PM  
What music are you currently listening to?
Posted By Boris_Akunin
Replies: 7,561
Views: 561,872
I've been exploring 1st Symphonies, Brahms' is up today:















You Tube




I had a little "So that's where that's from" moment at 33:27 (and again at 37:12). Growing up in Hamburg, I've heard that melody quite often.
If Hamburg ever becomes an sovereign state (again), this would be a good candidate to adapt as an anthem.

EDIT: Better recording (35:20 & 39:02 in this one):















You Tube



Forum: Non-Pentax Cameras: Canon, Nikon, etc. 07-24-2018, 01:35 PM  
The Sony A7 series picture thread -- bring your base, S, and R pics here!
Posted By Boris_Akunin
Replies: 206
Views: 21,332
Just a few quick picks from my first outing with the little Samyang FE 35/2.8 (all SOOC, auto WB, "Portrait" setting with slight changes, settings in the filenames).
The Hamburg harbour front is a busy place on a Sunday morning, made me rather miss my old home...










I'm going have to go through the shots (~140) and pick a few to edit up but I was mostly just playing around with my new lens. The AF is quite noisy and tends to hunt in low light but during the day I have no issues with it.
Makes for a nice little kit with the FE85/1.8.
Forum: General Talk 07-23-2018, 04:25 PM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Attachment 413391
These things work quite well, the inner grip is the grippiest I've seen and they don't interfere with lens hoods.

It may be sacrilege but the Pentax K28/3.5 shares it's 52mm filter thread with a number of my Canon nFD lenses, so it needs to fall in line...
Attachment 413392
nFD300/5.6; nFD35-105/3.5; nFD50/1.4;
nFD35/2; Pentax K28/3.5; nFD24/2.8
Forum: General Talk 07-23-2018, 10:01 AM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Just ordered JJC LH-JX100II hood, meant for the Fuji X100 but I'm hoping I can fit it on the Samyang 35/2.8:
Attachment 413340

I want a compact hood like the one for the Zeiss 35/2.8 but the Samyang is rather too short:

Attachment 413338 Attachment 413339

The JJC hood should work well (it's meant for a similarly small ~35/2.8 equivalent lens) but I need a way to attach it.
It comes in two parts, the actual hoodand an adapter piece that attaches to the X100's lens and ends in a 49mm filter thread on the inside and an unknown thread on the outside:

The hood part screws onto the outside thread. I'm hoping it's a standard 52mm filter thread but the sellers I contacted couldn't tell me and I don't think I'll get an answer from sales@jjc.cc (the only JJC mail contact I could find).
If it is a standard thread, a simple 49mm<->52mm reverse adapter should do the trick. I mean, that has to be either 52mm or a non-standard thread, right?
Seems like it would be idiotic not to use a standard 52mm thread, JJC makes lots of things with that thread so they'd have the right tooling.


Attachment 413345
Attachment 413336 Attachment 413337

I've been really enjoying the little Samyang but the flimsy little 40.5mm lens cap is annoying and the hood doesn't quite offer enough protection.

The JJC hood should be deep enough so that I don't have to bother with a lens cap when I'm out shooting.
Forum: General Talk 07-20-2018, 06:30 PM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Here's a closer look at the recently arrived Canon nFD 24/2.8.
I'm not even sure I won't sell both copies I have of this lens (I'd rather have a 20/21, the nFD 20-35/3.5L would be even better) but I'm sure as [expletive deleted] selling this one...













Is this what they call "mint condition"?
Forum: General Talk 07-20-2018, 09:13 AM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Omne possibile exigit existere.*








*("Everything that is possible demands to exist.") from "De veritatibus primis" (1686) by Gottfried Wilhelm Leibniz
Forum: General Talk 07-20-2018, 07:10 AM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Great idea! I'll just PM you my address, so you can send me that 27.3cm stack of dollar bills...
Forum: General Talk 07-20-2018, 06:55 AM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Attachment 412672



The LKUs have somewhat more variance than I had hoped (1 LKU = 4.8 0.2 mm), this will also limit stackability but - with proper alignment - only in the upper reaches of the required range.


To demonstrate the range:


Samyang FE35/2.8: ~10LKU (~7LKU from the lens mount) | Canon nFD300/5.6: ~44LKU (~41LKU from the lens mount)


With proper unit alignment, even fully erect lenses can be measured:


Canon nFD300/5.6 with hood extended: ~56LKU (~53LKU from the lens mount)


Here's the new Samyang with it's valiant (but somewhat bloated) AF ally to the left and the MF rivals it's trying to expel to the right:


Sony FE85/1.8: ~19LKU | Samyang FE35/2.8: ~10LKU | Canon nFD35/2 (with FE adapter): ~16LKU | Pentax K28/3.5 (with FE adapter): ~17LKU
Those values include Sony E-mount rear lens caps (~3LKU) and the E-mount adapters on the Canon (~4LKU) and Pentax (~5LKU).
Forum: General Talk 07-19-2018, 12:38 PM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Clear advantages:
- You can't lose them or forget them at home.
- They don't take up a meaningful amount of space when you don't use them

Possible advantages:
- They don't necessarily collide with filters & lens caps (if you use the right kind of lens cap) like screw-in and clip-in hoods
- Variable length (if they have enough friction to stay in place)

Disadvantages:
- Their length and shape is restricted by the design of the lens barrel (this one's quite ample but they're often too short)


I had a full set of Canon nFD lenses with 52mm filter threads for a while (24/2, 28/2, 35/2, 50/1.4, 85/1.8, 100/2), they all used the same hood bajonet and while they all had dedicated hoods (BW-52C, BW-52B, BW-52A, BS-52, BT-52),
the hoods were all interchangeable, a 24mm hood still gives some protection on a 35 or 50 and a somewhat longer hood still works on a wider lens (exchanging more soft vignetting for extra flare protection).

Unfortunatelly, only the BW-52C and BW-52B had petal shapes, I would have liked some longer petal hoods (I know the petal hood for e.g. the 100/2 would be quite long but I could always use one of the shorter ones).

Ideally, some lenses would have oversized bajonet mounts, so hoods could be intercompatible across a wider range of lenses.
The Canon nFD 135s & 200s don't have hood bajonets but the 52mm filter thread spans from 24mm to 200mm (within that range, only the 35/2.8 tilt-shift and the 85/1.2 have larger threads), so the lens caps are all interchangeable, so could the hoods be.

A (mostly) universal hood bajonet would add some bulk to the smaller lenses but I think that would be well worth it.



(Canon nFD nFD 300/5.6, 100/2, 50/1.4, 35/2, 28/2 & 24/2.8)


EDIT: Dammit, now my brain has latched on to the standardisation idea...


First, we'll adjust the most common prime focal lengths a bit to deal with the crop issue:

(10) - 15 - 23 - 35 - 55 - 85 - 130 - 200 - 300 - (450)

The ratios between the steps are now all between 1.5 and 1.57, so to get an APS-C lens hood for your FF lens, you just buy the hood for the next-longer prime lens.
A secondary set of steps could look like this (ratios between 1.5 and 1.56):

(13) - 20 - 30 - 45 - 70 - 105 - (160) - (240) - (360)

The lens hood bajonet needs to be slightly larger than the filter thread anyway, so we tie the two together.
Something like 77mm across the board would add too much bulk to all the smaller lenses but we do want 85/1.4's and 130/2's.
72-82mm would work as the largest thread (with a corresponding hood bajonet), we should be able to cover anything from 20/1.4 to 130/1.8.

Next we'll need a thread size that can cover anything except the largest primes, things like a 35/1.4, 55/1.4 and 85/1.8 should fit here.
Something like 58-67mm should have us covered, a prime lineup like this should be possible:

20/2.8 - 23/2 - 30/1.8 - 35/1.4 - 55/1.4(1.2?) - 85/1.8 - 105/2 - 130/2.4

As for zooms, a 15-35/4 or 23-105/4 would probably need the larger thread/bajonet but a 23-70/4 & 70-200/4 as well as variable-aperture lenses like 20-45/3.5-4.5, 23-130/3.5-5.6 or 70-300/4-5.6 would fit here.

I'm not sure if we'd really need a small 3rd standard but a set of small primes (with diameters around 65mm and below) with 49-55mm threads could work:

23/2.8 - 30/2 - 35/1.8 - 55/1.8 - 85/2 - 130/2.8(3.5?)

Overall, we should leave some room for lens design and pick the larger side for all 3 standards (55mm, 67mm, 82mm).
Apart from extreme wide angle lenses and fast tele lenses (105/1.4, 200/2, 400/2.8, 200-400/4, etc.), we'd have everything covered and would never need filters or lens caps in any but these 3 sizes.

There would be some options for backward compatibility, e.g. step-up rings with bajonet hoods on the outside to bring old lenses into the new standard.
Forum: General Talk 07-19-2018, 11:32 AM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
I wouldn't think so, the 24 only has a few very fine scratches but the focus ring has about 1mm of play (that is unfortunately very common with the nFD lenses, it's due to the linkage between the focus ring an the helicoid wearing out but it has no impact on IQ), the 300 actually is pristine. I don't think either of them has been used much, I'll exchange it for my other nFD300/5.6 (no issues but slight signs of use) and sell that one.
My other 24/2.8 has few more signs of use than this one but slighty less play in the focus ring, so I'll b selling the new one.
Forum: General Talk 07-19-2018, 04:12 AM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
My Samyang FE 35/2.8 should arrive today and this arrived yesterday:

Attachment 412483

Attachment 412487

With the tiny little Samyang and this beanpole of a lens, I'm well-prepared to demonstrate both the precision and the stackability of the LKU(/LKE).
I will have to procure some more, though...
Forum: General Talk 07-17-2018, 07:50 PM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
That's a good selection! Do you scan your film? (I'd be interested in the Cinestill results, too)
Forum: General Talk 07-17-2018, 02:01 PM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Did you find something on transparency?
If we can find a material that can be bought in flat sheets and shares a band of transparency with the chocolate coating, Aslyfox could use newton rings to at least perform some QC on his cookies...



Surely, girth and hardness are more important...

Attachment 412162
(I was promised 31mm, I feel betrayed)
Forum: General Talk 07-17-2018, 01:31 PM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Any idea what the refractive index of chocolate is? (there must be some wavelengths at which chocolate is transparent, right?)
Forum: General Talk 07-17-2018, 01:20 PM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Even more respectfully, the chocolate coating just introduces another factor for thickness variance.
I suspect the shape & dimensions of the basic Leibniz-Keks may be among the most stable of all food items.

The whole point of defining units of measurement is to make measurements reproducible with as little variance or drift as possible.
Forum: General Talk 07-17-2018, 11:24 AM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
I'm afraid I won't be able to replicate your methodology, but I think these might work as an alternative unit:
Attachment 412132

https://en.wikipedia.org/wiki/Leibniz-Keks
Forum: General Talk 07-17-2018, 10:09 AM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
So, what's the exact height of one of your SMUs? I might need to replicate it soon.

I picked up a Samyang FE 35/2.8 for 208,74€ (would otherwise cost ~265€) and a Sirui P-306 monopod for 29€ (otherwise ~50€) on Amazon "Prime Day".

Attachment 412112 Attachment 412116

I'm not sure if the AF will work well enough on my old A7 mk.1 (I can resell it at a small profit if it doesn't...)

It certainly makes for a nicely compact kit and complements my FE85/1.8 quite well:

Attachment 412117

I doubt it'll make me want to sell my other lenses in that FL range (Canon nFD 35/2, Minolta MD 35/2.8, Pentax K28/3.5 <-- those are all too good to sell) but I can easily offset the cost by selling a few lenses/cameras that I don't use anyway (Pentax KX, KM, K55/1.8, M50/1.7; Canon nFD24/2.8, 35-105/3.5, 300/5.6).
Forum: General Talk 07-09-2018, 05:23 PM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
A friend brought me back something from his trip to the Haute-Provence:



I've missed this stuff (brings back good memories...), certainly the best Pastis I know.
Forum: General Talk 07-06-2018, 11:52 AM  
Your latest acquisition
Posted By Boris_Akunin
Replies: 21,791
Views: 1,570,789
Right, I just got off the phone with Otto customer service. They'll pick up the lens hoods on monday and I got a 50€ rebate code.
It's not exactly maximising profit but it's decent money for next to no effort and I did get a good laugh out of it...
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