Selecting the right broadcast minicam lens


Steffan Hewitt TV-Bay Magazine
Read ezine online

So we all know that HD and 4K (and beyond) is the norm for content creation and delivery, with the need for unique and versatile shots being offered to increase the audiences participation and visual experiences. A major factor aside from the camera itself is the selection of lens, for some of the UHD sensor formats a broad spectrum of "off the shelf" lenses exist - this however can mean that in some restrictive instances (such as In-Goal and In-Car environments) the physical size of the camera and lens are too large and therefore not suitable for the application.

An ideal camera choice for such applications would be the Toshiba IK-4K (UHD and 1080i/p) or the HD5 (1080i/p) minicam systems. These 2 part cameras have a small camera head just 32mm x 38mm x 41mm and weighs in at 70grms and can be positioned very discretely and unobtrusively within Goal zones, Hockey nets, Basketball back boards, Vehicles, Stages, Properties and Studios alike; whilst the Camera Control Unit (CCU) can be positioned anything up to 15m away using a basic configuration (or infinite via Remote Control). These cameras produce stunning quality images and so far the only perfect Prime lens for them has been the Fujinon TF4XA-1 Ultra Hi Definition 4mm lens. Whilst providing greatly improved images and with a field of view (FOV) of 71deg, for some, this is not wide enough, therefore a solution had to be found for a wider FOV similar to that of a 2.8mm (95 deg or more) lens.

This problem needed to solved and enable such shots to be achieved; as the UK and European Centre Of Excellence for Toshiba, Polecam approached leading lens manufacturers to provide an Ultra Hi Definition lens to accommodate the wider FOV requirement. It soon appeared apparent that physical size and costs would prove prohibitive - to both the manufacture and the end-users alike. Never wishing to be defeated, an urgent rethink was needed if the existing applications where wider FOV were already a proven success had to move in to the UHD domain. Working closely with a bespoke lens specialists, a brief was created using valuable client feedback and sure enough ideas started to develop and a rather smart and cost effective solution was created - the .7 Wide Angle Adapter.

The adapter had to be robust, quick and simple to install without the need for any tools and provide the same filtering bolt-on functionality as found in the existing non UHD 2.8mm lenses. Very importantly the adapter could not inhibit or compromise any of the prime lens UHD performance and allow full Goal Zone areas and in car shots to be achieved without distortion or vignetting in the corners. The design enables the .7 adapter to positively screw directly to the existing UHD 4mm prime lens and provides a FOV in excess of 95deg, whilst enabling the use of screw-on filters to include Infra-Red Cut, Neutral Density and more.

For those that like to read figures and facts and, could probably talk a glass eye to sleep - please enjoy:

Dimensions of the Adapter are 60.5 mm diameter and 34 mm long. The adapter mounts on to the TF4XA-1 via the 30.5 mm external thread on the front of the prime. The Adapter has an M60 x 0.5 thread to the front to facilitate the mounting of filters. Please note that when measuring the performance of an adapter that works with a prime lens the MTF is measured as Angular Frequency in cycles per milliradian. In this instance 0.40 mr is equal to 100 cycles.

The LE310 Wide Angle Adapter will increase the Horizontal FOV from 71 deg to a minimum of 95 deg.

And for those that know it makes pure sense to include this new and exclusive to Polecam cost effective .7 Wide Angle Adapter to their systems for just 945GBP, please contact sales@polecam.com or telephone +44 (0) 1234 855 222 to arrange for your purchase or demonstration.


Tags: iss118 | polecam | toshiba IK-4K | lenses | toshiba | Steffan Hewitt
Contributing Author Steffan Hewitt

Read this article in the tv-bay digital magazine
Article Copyright tv-bay limited. All trademarks recognised.
Reproduction of the content strictly prohibited without written consent.

Related Interviews
  • Polecam Toshiba Minicams at BVE 2014

    Polecam Toshiba Minicams at BVE 2014

  • Polecam Slow Motion Minicams at BVE 2014

    Polecam Slow Motion Minicams at BVE 2014

  • Polecams range of accessories and minicams at IBC 2013

    Polecams range of accessories and minicams at IBC 2013

  • Polecam at IBC 2016

    Polecam at IBC 2016

  • Guided Tour of the Polecam Stand at BVE 2016

    Guided Tour of the Polecam Stand at BVE 2016

  • Polecam at IBC 2015

    Polecam at IBC 2015

  • Polecam Antelope Pico at IBC 2014

    Polecam Antelope Pico at IBC 2014

  • Polecam presents award to AMS Pictures at NAB 2014

    Polecam presents award to AMS Pictures at NAB 2014

  • Polecam talk accessories on BroadcastShow LIVE 2013

    Polecam talk accessories on BroadcastShow LIVE 2013

  • Polecam talk high speed on BroadcastShow LIVE at IBC 2013

    Polecam talk high speed on BroadcastShow LIVE at IBC 2013

  • Polecam: Z10 zoom lens at NAB 2013

    Polecam: Z10 zoom lens at NAB 2013

  • Polecam at BVE 2013

    Polecam at BVE 2013

  • Polecam at BVE North 2012

    Polecam at BVE North 2012

  • Polecam at IBC 2012

    Polecam at IBC 2012

  • Polecam at NAB 2012

    Polecam at NAB 2012

  • Polecam at BVE 2012

    Polecam at BVE 2012

  • Polecam at BVE North 2011

    Polecam at BVE North 2011

  • Polecam at IBC2011

    Polecam at IBC2011

  • Kit Overview from IBC 2015

    Kit Overview from IBC 2015

  • Steffan does the Surf Forecast

    Steffan does the Surf Forecast

  • New Filters from Schneider Optics at NAB 2018

    New Filters from Schneider Optics at NAB 2018

  • BeyondHD - Drones at BVE 2015

    BeyondHD - Drones at BVE 2015

  • Cooke Optics technology at IBC 2014

    Cooke Optics technology at IBC 2014

  • Cooke Optics talk anamorphic at IBC 2014

    Cooke Optics talk anamorphic at IBC 2014

  • Canon on BroadcastShow LIVE at IBC 2013

    Canon on BroadcastShow LIVE at IBC 2013

  • Cooke Optics on BroadcastShow LIVE at IBC 2013

    Cooke Optics on BroadcastShow LIVE at IBC 2013

  • Cooke Optics at BVE 2012

    Cooke Optics at BVE 2012

  • Cooke at IBC2011

    Cooke at IBC2011


Related Shows
  • The KitPlus Tv Guests of Season 2

    The KitPlus Tv Guests of Season 2


Articles
Sennheiser MKE 400 hands on review and test
KitPlus

Sennheiser have just released two products aimed at simplifying audio on the move, the MKE400 shotgun microphone and the XS Lav Mic, in this review we’re looking at the MKE400.

Tags: sennheiser mke400 | sennheiser mke 400 | sennheiser mke 400 quality | best microphones for youtube | mic for youtube videos | sennheiser mke 400 hands on | microphone review | iphone videography | microphones | sound for video | camera microphone | microphone for iphone | microphone for youtube | video microphone | shotgun mics | smartphone microphone | vlogging mic | best microphone for video | shotgun microphone review | mke 400 | sennheiser mke 400 hands on review | sennheiser mke 400 test | KitPlus
Contributing Author KitPlus Click to read
A Broadcasters Guide to Microservices
Roger Persson

The word “microservices” has been creeping into the conversation about software-centric systems recently. Is it really a different approach, what does it mean, and what are the advantages?

Tags: nxt edition | microservices | modular software | Roger Persson
Contributing Author Roger Persson Click to read
Streaming Technologies Explained
Bruce Devlin - new

The word streaming can relate to different technologies from different manufacturers in different scenarios and in this short article we are going to take a little tour of what it all means. 

Tags: mr mxf | streaming | hls | dash | cmaf | mpeg | Bruce Devlin - new
Contributing Author Bruce Devlin - new Click to read
REVIEW - Hollyland MARS 400S PRO Digital Wireless Transmission System
Phil Vinter

Built by Hollyland and costing around £600 the Mars 400S is an easy-to-use wireless video transmitter/receiver system – it will be right up the alley of anyone who, like me, considers an instruction manual to be nothing more than box padding.

Read Phils Full review here, and link to the video review.

Tags: HOLLYLAND | MARS 400 | wireless | tx | rx | Phil Vinter
Contributing Author Phil Vinter Click to read
HOLLYLAND LARK 150 Review
Phil Vinter

The exponential growth of video supercharged a technological revolution that began in the early noughties with the advent of DSLR cameras.
The cinematic-style shallow depth of field image video quality from DSLRs was a revelation, but, back then audio was the big drawback. As demand has grown so the technology has improved and today’s one-man-band small rig set ups can capture pretty good sound into a DSLR style camera.

Phil Vinter reviews the latest release from HOLLYLAND and it's a thumbs up from us.

Tags: HOLLYLAND | radio mic | audio | LARK-150 | CVP | Phil Vinter
Contributing Author Phil Vinter Click to read